Business handset with ear hook. Perfect for hands-free calls, e.g. when traveling by car. Allows you to listen to music and have calls. Wireless streaming allows you to enjoy your favorite music without having to plug in the cable. The built-in microphone allows you to make calls. The large battery capacity (100 mAh) ensures long-lasting operation of the handset up to several hours. The compact size and light structure make it easy to carry and store the product, and do not cause discomfort during use. Specification: Bluetooth version: V4.1 Battery capacity: 100 mAh Working range: 10 m Standby time: 180 hours Working time: up to 6 hours Charging time: 2 hours Frequency: 2.402G-2.480G Working voltage: 3.4V-4.2V Transmission power: 0 dbm