Description HIGH PRECISION: High precision and copying efficiency, easy and convenient to operate. Bringing you a new remote control experience, very convenient in daily life HOW TO USE: Hold the copy remote in one hand and the copy remote in the other hand. The two remotes should be as close as possible. Press the buttons on both remotes at the same time. After 3 seconds, the LED flashes WIDE APPLICATIONS: Wireless remote duplicator, duplicate your existing remotes for car, car sunroofs, garage doors, gate doors, electric doors and windows, heating systems, lighting and system home automation alarm, etc. OF RECOVERY METHOD: If the useful data is erased by mistake, you can press the two buttons on the back (below) of the remote control at the same time without copying the other remote controls. Features: Model: 4-key AV ID remote control Type: Enhanced Special Frequency Copy Remote Control Operating voltage: 6 V (2 x 3 V 2016 model button battery) Operating frequency: 433MHZ special frequency (other frequencies can be customized) Number of keys: 4 Remote control distance: 50m (in open environment) Copiable chip: Fixed code and learning code remote control: PT2240, PT2260, PT2262, EV1527, FP527, AX5326, PT2242, HT600, HT680, HT6207, HT6010, HT6012, HT6014, AX5326-4, SMC5026, SMC53253-3, SMC53253-3, , SMC918-3, SMC918-4, etc. Size: approx. 6.2x3.5x1.1cm/2.44x1.38x0.43inch List of packages: 1 remote control