Features: 1.Connect to Bluetooth Compatible audio device via 3.5mm audio plug, make it able to work with Bluetooth Compatible A2DP headset/speaker. 2.With 3.5mm audio plug, fit for most kinds of audio devices, such as TV/MP3/MP4/PC. 3.Plug and play, no need installation. 4.Built-in rechargeable li-battery, can work for 5~7 hours after fully charged. 5.Compact size, portable and lightweight. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: Technology: BT4.25.0, A2DP, AVRCP (Receiver mode only) Operating range: up to 10m / 33ft (without any obstacles) Charging time: 2 hours Continuous use time: 6 hours (receiver mode) / 5 hours (transmitter mode) Battery Type: Lithium Polymer (200mAh) Size: 444412mm includes: 1 x Bluetooth Compatible Audio Transmitter Set