Arion Rapoo H6020 Bluetooth 4.1 Auto Switch Stereo Headset Wireless Headphone with hidden Microphone - Blue 2.4G 10 meters two-way wireless transmission technology keeping interference away from other bluetooth and Wi-Fi channels 1000 DPI high-definition invisible tracking engine Rapoo's latest energy saving technology and power switch, battery life up to 9 MONTHS. Main power ON/OFF switch saving for longer battery life Modern, simple, multi-color optional, Nano receiver build-in & portable design makes M10 the classic and long lasting model Fully plug and play, drive free