Features: 1. Fast transmission speed: The data transmission rate of this product is increased to three times that of the current technology, and the transmission speed is very fast. 2. Strong compatibility: It can be compatible with all A2DP stereo devices, for Android, for iPad, for iPhone4, for iPhone3G or 3GS and other products for apple. 3. Practical: This product supports audio playback and answering calls, which is very practical and suitable for use in cars. Descriptions: This product supports all speakers with U disk port to play music. You can also connect the car USB port to play music in mobile phones, tablets, MP3, etc. and reduce the frequency of U disk insertion and drawing. Specifications: Material: plastic Color: black, white(optional) Item Size: 5x2x2CM Power supply: USB 5V Output: USB port, 3.5mm audio interface Receive distance: 10m Package included: 1 x Wireless Receiver Adapter 1 x 3.5mm Audio Cable Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Due to different personal measuring techniques, there might be 1-3cm error of the physical. Thank you!