Prerequisite select remote control: the original remote control function is normal, the remote control chip is the same or compatible, the remote control working frequency is the same. The remote control can only copy the fixed code, learn the code chip and part of the single-chip remote control (copy the chip model). Two-way remote control, rolling code remote control, single-chip encryption program remote control cannot be copied. Such as HCS200, HCS201, HCS300, HCS301 and so on. Before copying the remote control, make sure that the existing code in the remote control is cleared and the code is cleared successfully. Otherwise, it cannot be copied. Make sure your remote control has enough power, the distance between the two remote controls is better! If the copy distance is too close to the key at different angles to copy. Press and hold the button on the original remote control to send the signal completely normally, and then press the button on the remote control to that the function is completely copied. Color: black Material: plastic Size: 60x36x12mm Type: wireless remote control. For: such as electric telescopic door remote control, road gate remote control, alarm remote control and so on. Rated voltage: 27A12V battery (included). Wireless transmission distance: 50-150 (m). (open area) Package contents: 10x 433MHZ remote control (including battery) 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 picture a little different from the real thing. The measurement allowed error is 1-3cm.