Brand LanHu Model 2 Quantity 1 Color White Material ABS Wireless Technology Bluetooth Bluetooth Standard V2.1 USB Standard 2 Frequency 2.4 GHz Operation Range 10 m Suitable Device The devices with 3.5mm jack Data Transmission Rate 2.4Mbps Sensitivity -100~-120dBm OS System A2DP / AVRCP / Headset Profile / Handfree Profile Other Features Suitable for all the audio devices with 3.5mm jack; With the dongle the audio from CD / DVD / MP3 / MP4 / PAD / Ipad and other devices can transmit to your Bluetooth speaker and earphones; Built-in 140mAh lithium battery; Bluetooth V1.2 stereo chip module; 3.5mm plug and mini USB charging port; Plug and play; Frequency: 2.4~2.48GHz; Charging time: 3 hours; Working time: about 100 hours; Talking time: 4 hours Packing List 1 x Bluetooth dongle 1 x USB cable (120cm) 1 x Charger adapter (100~240V / EU plug) 1 x English user manual