boAt Rockerz 338
In-Ear Wireless Earphones with ASAP⢠Charge & 30 Hours Playback
Massive Playback, Rapid Charging
Rockerz 338 comes equipped with ASAP⢠Fast Charge technology, yielding 10 hours of playtime in just 10 minutes of charging, plus a massive playback of up to 30 hours in one go:
- 10mm x 2 Dynamic Drivers â 98dB sensitivity, 16 Ohms impedance
- ASAP⢠Charge â 10 min charge = 10 hrs playback
- Up to 30 Hours Playback â All-day battery life
- Dual Pairing â Connect two devices at once
- cVc Noise Cancellation â Clearer voice calls
- IPX5 Water Resistant â Built for active use
Key Features at a Glance
đľ 30 Hours Playtime
All-day music and calling on a single charge
⥠ASAP⢠Charge
10 mins charging = 10 hrs playback
đ Dual Pairing
Connect two devices at the same time
đ Smart Call Handling
Switch and transfer calls via MFB
Full Specifications
| Specification | Details |
| Type | In-Ear Bluetooth Wireless Earphones |
| Bluetooth Version | V5.0 |
| Driver Type | Dynamic |
| Driver Size | 10mm x 2 |
| Sensitivity | 98dB Âą 3dB |
| Impedance | 16 Ohms |
| Frequency Response | 20Hz â 20kHz |
| IPX Rating | IPX5 |
| Battery Capacity | 150mAh |
| Playback Time | Up to 30 Hours |
| Charging Time | 30-40 Minutes |
| Charging Interface | USB Type-C |
| Compatibility | All Bluetooth Devices |
| ASAP⢠Charge | Yes; 10 mins charge = 10 hrs playback |
| cVc Technology | Yes |
| aptX Codec | No |
Technology & Features
ASAP⢠Charge Technology
10 Minutes = 10 Hours of Playback
boAtâs patented fast-charging technology provides exceptional battery efficiency (may vary by conditions).
Dual Pairing
Connect Rockerz 338 to your first device, then switch off both the earphones and that device. Connect to your second device and switch the first deviceâs Bluetooth back on â the earphones will connect to both. If they donât reconnect automatically, pair to the first device manually once more.
cVc Noise Cancellation
Rockerz 338 includes Qualcommâs Clear Voice Capture (cVc) noise cancellation feature for clearer voice calls.
Multi-Device Call Switching
If Rockerz 338 is connected to two phones and a call comes in on the second phone while youâre already on a call with the first, press the MFB to switch to the second call while placing the first on hold. You can continue switching between the two calls using the MFB. Press and hold the MFB to transfer an ongoing call between the earphones and the phone.
Multifunction Button (MFB) Controls
| Action | Function |
| Press & hold MFB (3 sec) | Power ON / Enter pairing mode (beep prompt confirms) |
| Press & hold MFB (5 sec) | Power OFF (beep prompt confirms) |
| Press & hold Volume Up + Volume Down together (5 sec) | Factory Reset / Clear paired devices (red & blue LEDs flash thrice) |
| Single tap MFB | Play/Pause, Answer/End call |
| Press & hold MFB (2 sec) during ring | Reject call |
| Triple tap MFB | Redial last contacted number |
| Press & hold MFB (2 sec) | Activate Voice Assistant |
| Press MFB (during second incoming call) | Switch between calls from two devices |
| Press & hold MFB | Transfer call between earphones and phone |
| Long press Volume Up (+) | Next Track |
| Long press Volume Down (-) | Previous Track |
| Tap Volume +/- | Adjust Volume |
Pairing & Connectivity
Initial Pairing
- Press & hold the MFB to power on the earphones and enter pairing mode
- A prompt sounds and the LED indicator flashes rapidly to confirm pairing mode
- Turn on Bluetooth on your device and search for âRockerz 338â in the list of available devices
- Select the device from the list; enter passcode 0000 or 1234 if prompted
- Once connected, the blue LED flashes twice every 4 seconds to indicate the same
Dual Pairing (Connect 2 Devices)
- Connect Rockerz 338 to your first device
- Switch off both the earphones and the first device
- Connect the earphones to your second device, then switch the first device back on
- The earphones will get connected to both devices; if not, connect the first device manually once again to activate dual pairing
LED Indicator Guide
- Power ON / Pairing mode: Red and Blue LEDs flash alternately
- Connected: Blue LED flashes twice every 4 seconds
- Factory reset successful: Red and Blue LEDs flash three times simultaneously
- Charging: Solid Red LED
- Fully charged: Solid Blue LED
- Low battery: Red LED flashes quickly with a âLow Batteryâ prompt (under 10 minutes talk time remaining)
Charging & Battery
How to Charge
- Use a USB Type-C charging cable to charge the earphones via a laptop or a wall adapter
- Use only a 5V/2A wall adapter for correct charging voltage
- Full charge takes around 30-40 minutes; Rockerz 338 supports fast charging via ASAP⢠Charge
- Solid Red LED indicates charging; the LED turns solid Blue once fully charged
- Note: The earphones cannot be switched on while charging
Troubleshooting Guide
Bluetooth Connectivity Issues
Earphones not connecting via Bluetooth
- Check the earphones are in pairing mode (red and blue LEDs flashing alternately) by holding the MFB for 5 seconds
- Confirm the device is within 10m range with no obstructions
- Clear the pairing list by holding Volume Up and Volume Down together for 5 seconds in standby mode
- Check the connecting device supports Bluetooth connections
- If prompted for a passcode, try 0000 or 1234
- Check for software issues on your phone; try forgetting the device or updating mobile software
Connection is unstable or breaking intermittently
- Ensure there are no objects between the earphones and your wireless device
- Ensure there is no radio or Wi-Fi interference nearby
Unable to dual/multi-pair with two devices
- Pair to the first phone as per usual procedure, then switch off the earphones
- Switch the earphones back on, enter pairing mode, and pair to the second phone
- Switch off the earphones once more, then switch them on normally (short press until LED comes on) so they auto-reconnect to the second phone
- On the first phone, find âRockerz 338â in Bluetooth settings and pair to it as well â both phones should now be connected
- Try pairing with other devices to isolate the issue
Charging Issues
Earphones not charging or battery life is low
- Test the charging cable with another device
- Use only a 5V/2A wall adapter
- Check the charging is done until the LED turns completely blue
- Verify the battery wasnât tampered with or exposed to electrical damage
- Check for dirt or debris in the charging port and clean with a cotton swab
- Confirm the adapter and cable support fast charging
Sound Issues
Sound is distorted, low volume, low bass, or muffled
- Set your phoneâs equalizer to normal/default/none/0 (see phone-specific EQ paths below)
- Move closer to the connected device and remove any obstructions
- Test with different media players and devices to isolate the issue
- Clean ear wax buildup with a cotton swab and alcohol, then gently blow dry from a distance
Volume changes automatically
- Check equalizer settings on the connected device
- Test with a different media player or device to isolate the issue
Caller canât hear my voice clearly during calls
- Adjust the volume on both your phone and the earphones
- Make sure thereâs no source of interference nearby
- Keep the smartphone within Bluetooth range
Power & Control Issues
Earphones donât power on or one side isnât working
- Confirm the device has been fully charged (LED turns solid blue when complete)
- Verify the charger voltage is 5V/2A
- Check for mishandling, broken wires, or exposure to direct sunlight or fire hazards
Built-in controls not working
- Unpair/Forget the device and pair again
- Test controls when connected to a different device
- Verify the media player supports Bluetooth controls
- Check for physical damage or hazard exposure
Voice assistant doesnât wake up
- Check that Google Assistant or Siri is enabled on your paired device
- Long press the MFB for 2 seconds to activate; this may be restricted by default on some devices
Microphone Issues
Microphone not working
- Ensure no objects are blocking the microphone
- Hold the microphone at an adequate distance to pick up your voice
- Check the microphone hasnât been exposed to hazards like direct sunlight or fire
- Check the microphone hasnât been exposed to water beyond its resistance rating or dipped in liquid
Phone-Specific EQ Settings
| Phone Brand | EQ Path |
| Vivo | i Music > Audio effect > Deep space sound effects > Equalizer |
| Xiaomi | Settings > Sound & vibration > Sound effects > Graphic equalizer |
| Samsung | Settings > Sound quality and effects > Equalizer |
| Realme | Settings > Sound > Equalizer (varies by UI version) |
| Oppo | Settings > Sound & vibration > Equalizer |
| Apple | Settings > Music > EQ |
| Motorola | Settings > Sound > Audio effects |
| Poco | Settings > Sound & Vibration > Graphic Equalizer |
| OnePlus | Settings > Sound Quality & Effects > Audio Tuner |
Frequently Asked Questions
How long is the battery life?
Rockerz 338 offers up to 30 hours of playback time. Full charging takes around 30-40 minutes and supports fast charging.
What is ASAP⢠Charge?
boAtâs patented fast-charging technology that provides up to 10 hours of playback from just 10 minutes of charging (may vary by conditions).
Does it support low latency for gaming?
No, Rockerz 338 does not support low latency.
Can I connect two devices at the same time?
Yes, Rockerz 338 supports dual pairing. Connect to your first device, switch off both the earphones and that device, then connect to your second device and switch the first device back on.
Can I switch between calls from two connected phones?
Yes. If a second phone rings while youâre on a call with the first, press the MFB to switch to the second call, placing the first on hold. Continue switching between calls with the MFB.
Does it support the aptX codec?
No, Rockerz 338 does not support the Qualcomm aptX codec.
Does it support Qualcomm cVc technology?
Yes, Rockerz 338 has Qualcommâs Clear Voice Capture (cVc) noise cancellation feature for clearer voice calls.
Can I use a mobile charger to charge my earphones?
Yes, Rockerz 338 wireless earphones can be charged with a mobile charger. Note that the earphones cannot be turned on while charging.
How do I redial the last contacted number?
Triple tap the Multifunction Button (MFB) to redial the last contacted number.
Need Help? Contact boAt Support
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Note: This guide is based on official boAt support documentation. For the most up-to-date information, visit boAt Support