3 in 1 TWS Mini Waterproof Bluetooth 4.2 Wireless Earphone + Audio + Charging Box 1. Three-in-one Bluetooth headset + audio + charging box. 2. Bluetooth 4.2, intelligent noise reduction, more stable signal, faster connection, clearer calls, working distance: 10 meters. 3. Support HI-RES lossless decoding, restore CD-level sound quality. 4. Comes with a mobile power supply box, 1200mAh power, up to 240 hours of standby time, and about 3-4 hours of talking and listening to music. 30 minutes of fast charging can provide about 8 times of charging for your earphones. 5. Bluetooth voice prompts, keep track of the various states of the mobile phone, such as: power onoff, incoming call number, low battery, etc. 6. It can connectuse two mobile phones or computers at the same time, so that work and entertainment can be done at the same time. 7. Ergonomically designed, the earphones are comfortable to wear and reduce the pain of wearing earphones for a long time.