Product Description Bluetooth Version:BK3.0. Frenquency:2.402-2.480GHz. MAX Power output:3W MIC Sensitivity:-32db . Receive Sensitivity:Better than +82dBm. Range:10meters Data Transmission:Up to 3Mbps UART Data Transmission Rate:115200bps . Charing Voltage :4.8V \u20135.2V DC. Working Voltage:3.7V \u20134.2V DC. Working Current:200MA. Quiescent Current:>1UA. Battery :600MAH. Antenna:Built in Wirless Bluetooth Input; Audio Transmission ; TF Card function; FM Optional Specification: 1. Compatible For For Iphone, Ipad, Cellphone, Laptop, Tablet PC, MP3, MP4, etc 2. Bluetooth Version Bluetooth 3.0 Interface Standard 3. Bluetooth Protocol Supports A2DP And AVRCP