Features: 1. Easy to use/ operate: IPX7 waterproof and simple touch control, automatic power on and pairing, electricity quantity display for Android and for IOS mobile phones. 2. For Bluetooth V 5.0: 10M effective transmission distance; 4-5 hours working time, 150 hours standby, only 30 minutes charging. 3. 2000mAh charging box: sufficient power supply for your whole day use; full of practicability and convenience. 4. 2-in-1 connection: support sync connections with 2 cellphones, CVC 8.0 noise reduction, smart voice prompt function. 5. Multi function: strong anti-interference, magnet adsorption charging, stereo and mega bass sound, automatic re-connection, etc. Specifications: Color:Black, white For Bluetooth version:V5.0 Charging:30 minutes Distance:10M Standby:150 hours Working time:4-5 hours Auto power on/ pairing/ re-connection 2000mAh 2-in-1 connection:Yes Noise reduction:Yes Package list: 1 x Headset 1 x Charger cable 1 x Charging box 1 x Ear muff 1 x Instruction 1 x Packaging box