DLAND Wireless Stereo Bluetooth 4.0 CSR8610 Headset earphone with Charging Dock For Cell Phone Tablet Bluetooth 4.0 with CSR8610 chipset produces crystal-clear sound quality. CVC (Clear Voice Capture) advanced echo and noise cancellation technology. On ear controls let you manage calls and volume all from the headset. Built-in rechargeable battery gives you up to7 hours of talk time and 400 hours of standby time. Charging dock with car air vent mount securely holds the headset in place whilst on charge.