Description: It can connect to the 3.5mm AUX port in your car to enable your car sound system to stream audio from smartphones wirelessly, make non-Bluetooth devices become wireless Stable transmission, low delay, fast operation, compatible for home theaters, stereo systems, and car stereos etc. Support TF card playback, no need to connect to the phone by bluetooth then you can enjoy music easily Back with clip design, tight and firm, easy to clip on clothes, not easy to drop,and easy to carry It can be fully charged in 2 Hours , built-in 200mAh rechargeable lithium ion battery, can play music last for 20 hours Specification: Name: Bluetooth Audio Receiver Model: SR11 Main Feature: Bluetooth Receiver/TF Card Player Bluetooth Protocol: AVRCP\A2DP\HFP\HSP Output:3.5mm Aux Charging time:About 2 Hours Signal to noise ratio:less than 90db Size: Approx.10.0cm x7.0cmx3.0cm/3.9 x 2.8 x 1.2 inch Color: Black Package Includes: 1x Bluetooth Receiver Adapter 1x Charging cable 1x User Manual Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you