It supports TF card play mode and bluetooth-compatible play mode, and you can listen to it as you like. The bluetooth-compatible receiver is easy to operate and automatically connects. Made of ABS high quality material, it is lightweight and durable to use. The length of this product is 5.5cm, the width is 2.5cm and the height is 1.5cm. It is compatible with most smart phones and bluetooth-compatible electronic devices, it is very suitable for home or car sound system and wired earphones, car AUX, speaker with AUX hole and other devices, it supports answer, hang up, refuse, call back and other telephone functions and it can make car stereo, play mobile phone music, navigation and hands-free calls. Item Name: bluetooth-compatible Receiver Material:ABS Operating Hours: About Eight Hours Batteries: 200mAh (Included) Charging Time: About 1.5 Hours Bluetooth Version: BL5.0 and EDR Bluetooth Distance: About 12 Meters Size:5.5cmx2.5cmx1.5cm/2.17inx0.98inx0.59in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Please use the attached charging cable to charge the receiver and do not charge for a long time.Package Includes: 1 X bluetooth-compatible Receiver 1 X USB Cable 1 X AUX Connector 1 X User Manual