Technical Parameters Power Input: 7-32V, Users should not exceed these power inputs Channel:2CH. Frequency:433MHz. Memory Capacity:200 remotes. Learn button and LED In the Multi receiver there are 2 independent channels. Each channel has an independent learn button S1, S2. The LED L1 corresponds to S1 and the LED L2 corresponds to S2. Operation How to enter remote and erase all remotes. Coding the remote: a. Select the dip switch for the brand and model. b. Press the learn button S1 or S2, the LED will turn on. Press the button on the remote, the LED flashes 4 times. The selected button has been learnt successfully. c. Repeat step 2 for any other button. Please note S1 is Channel 1 and S2 is Channel 2. Erase all data in memory card: Pressing and holding either S1 or S2 learn button, the LED will start to flash. Keep holding this button until the LED turns off. All data in the memory card will be erased permanently. WARNING: Be careful when erasing all data in the memory card. The data will be erased permanently and cannot be recovered. Color: Black Material: plastic Package Contents: 1 x Garage receiver