High-quality signal transmission wireless device, with 20 of use distance less than 5ms signal delay, anti-jamming, etc. 12 channels, just a simple setup, can be applied to a of occasions, say goodbye to wire . Easy to install and durable in use. Built-in rechargeable lithium battery, long working time, with universal Android port USB cable, easy to charge. Plug and play, easy to use, small size, light weight, easy to carry. Colour:blue :ABS+Metal Package Contents: 1 x Transmitter 1 x Receiver 1 x Charging Cable 1 x Chinese and English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.