1. Q: How to activate the UV sterilization function of headphones?
A: Simply put the earbuds in the charging case and the UV will automatically sterilize the bacteria for 30 seconds.
2. Q: Can I see the UV light in the charging case when sterilizing?
A: No, you cannot. But you can see the four LED lights flash slowly for 30 seconds during the sterilization.
3. Q: Is the Onyx Free waterproof?
A: Yes, the earphones have IPX7 protection but the charging case is not waterproof.
4. Q: Can I use the Left or Right earphone alone?
A: Yes, you can.
5. Q: How to reset the Onyx Free earbuds?
1) Forget the 'Tronsmart Onyx Free' on your device's Bluetooth list.
2) Take two earphones out of the charging case. Tap and hold the button for 5 seconds to power them off.
3) Tap and hold the buttons on earbuds for 8 seconds until the red and blue lights flash rapidly.
4) The earphones have been reset to the default settings. Then connect to your device refers to the “Bluetooth pairing” above.
6. Q: Does the case support wireless charging?
A: No, it does not.
7. Q: What functions can be achieved through button control?
A: Volume up/down, pause/play, previous/next track, answer/end/reject a phone call, activate the voice assistant.
8. Q: How long does it take to fully charge the earphones?
A: About 1 hour. And it also supports five-minute charging for two-hour use. (For those compatible devices only)
9. Q: How long does it take to fully charge the charging case?
A: About 2.5 hours.
10. Q: What audio codec does the Onyx Free support?
A: AAC, SBC and aptX (aptX is for those compatible devices only).
11. Q: Do the earphones supports auto-connection when I open the case cover? Or do I need to take out the earphones?
A: The earphones will auto re-connect to your phone when you open the case cover.
12. Q: How much do the earphones weight?
A: About 4g / 0.14oz each. And the weight of the charging case with earphones is about 36.2g / 1.28oz.
13. Q: How long can I use the earphones once a time?
A: On the 50% volume level, the playtime is about 7 hours. With the charging case, the playtime can be up to 35 hours. The playtime depends on the volume level, music genres, environmental conditions and more.
14. Q: Is the Onyx Free noise cancelling?
A: Equipped with cVc 8.0 noise cancellation and DSP technologies, Onyx Free guarantees crystal clear calls.
15. Q: What's the charging port? Micro or Type-C?
A: It's the Type-C charging port.
16. Q: Is there any indicator light to know the remaining battery of the charging case?
A: Yes, there are four LED indicators on the case to show the remaining power.