Check your device Frequency and IC chip model before buying Must be meet the following three conditions: 1. You must have a good remote controller. (Or will copy the bad command, can't work) 2. You need to know the device frequency and IC chip model of your current remote controller. 3. This remote controller is mainly suitable for rolling doors, retractable doors, Road gates, etc. For example: open your remote controller and check device frequency 433, the IC chip model is 2264, and you also have a usable remote controller, will be ok to choose this product. Chips could be copied 2260(all manufacturers);2262(All manufacturers);PT2264, 5326(All manufacturers);SC5262, HT600, HT680, HT6207, HT6010, HT6012, HT6014, SMC918series,527(All manufacturers);1527(All manufacturers);2240(All manufacturers);HCS101, HCS200/HCS201(part code),HCS300/HCS301, part single chip microcomputer.... RF frequency type: 433 (Listing product only supports 433.92 MHZ) Duplicate Your Existing Remote Controllers so you always have a backup: 1. Vehicle central locking systems 2. Garage doors 3. Electronic gates 4. Electrical appliances/Home automation i.e. lights 5. Car sunroofs 6. Car/Motorbike alarms Specification: Operating Current: ≤12mA Operating frequency: 433.92Mhz Transmitting power: ≥10mW Transmission Distance: 50 meters (open) Frequency deviation: ± 0.2MHz Transfer rate: 50--60KHZ Working temperature: -20~70℃ Storage temperature: -10~ 50℃ Humidity: 85% or less Package includes: 1x Remote Control 1x Instruction manual Code cleaning method: Press the unlock button and lock button at the same time(some shells are the up button and down button), after the LED indicator light flashes three times, loosen any one of the buttons while the other is kept pressing, then push the released button three times, the LED indicator will enter into the fast flashing status. At this time all the memory data is cleared, and the cleaned remote control will not have a lighting LED indicator no matter which button you press. Copy method: One hand keeps the original remote controller, while another keeps the copy remote control, the two remote controls should be placed as closely as possible (the ideal situation is to put the two remote controls on the desktop side by side with zero distance), respectively press down the copy button, when the LED indicator light flashes quickly after three flashes, this copy is successful, other key operating methods are the same. Some remote control has a smaller transmitting power, so the original remote control should be placed back into the copy remote control to be operated. For the presence of noise, it should avoid interference to operate, If the copy is not successful, it should recopy after clearing the code.