CSR8640 bluetooth chip with stable signal
Two drivers -- super good sound quality: high-fidelity stereo sound quality, compatible with most smartphones, iPhone and Android.
Comfortable to Wear - Ergonomic silicone ear tips allow you listening to the music for a long time free of pain and keep a long sense of comfort during the wear.
Built-in microphone - easily answer calls with Crystal clear sound and remarkable convenience.
16 hours playing time: Upgraded built-in lithium batteries support up to 16 hours talk / music time. Only charge for 1-2 hours can get full energy back.
Bluetooth Chip : CSR8640
Bluetooth version: 4.1
Driver: 6mm driver*2
Charge time : 1.5 hours
Effective Distance : 10 meters
Talk/Music time : 16 hours
Standby time : 280 hours
Battery : 3.7v/250mAh