My friend, if you need to buy more than one, you can click on the image below to make your purchase at a very good price. Universal Multi frequency 300-868mhz garage door receiver Specifications: 1)Name: Universal receiver SMG-662. 2)Operating Voltage: 9V-30V 3)Channel: 2. 4)Frequency: 300MHz - 900MHz. 5) Distance: 30-50 meters. 6) Very mini size: 5.5cm*4.5cm*1.0cm. 7) One receiver can work with 400 codes. 8) It dont interference other remotes and receivers. 9) Brand selector: With 8 dip switches user can make different combination for different remote brands. 10)Code: Rolling and Fixed code & Learning code. 11)Uses: Receiver is designed to control any gate automation system, burglar alarm system, electric doors, windows, lifting equipment, gateways, lifting devices. This is an easy to use, good looking, low power consumption and is easy to connect to your existing system. 12) Power Input Selector: This receiver can work at AC/DC 9V~30V. However, its better to change the PIS according to the power input. If the input is great than 24V, shorten pin 2&3; shorten 1&2 if input less than 24V. Working frequency: 300-900MHz(Rolling code & Fixed code) 300MHz 310MHz 315MHz 318MHz 390MHz 433.4MHz 433MHz 433.92MHz 868MHz 868.3MHz 868.8MHz Can identify ALL Fixed code (2262, 2260, 2264, 5326, M1E, M5E and so on). All Learning code (1527, 2240, 6P20B, 6P20D and so on), Rolling code (HCS301, HCS300,HCS200, HCS201, HCS100, HCS101), Compatible with more than 90% brands on the market, If you are concerned about compatibility issues, you can ask me privately Include 1 x Receiver 1 x Small Antenna 1 x English Manual Programming a new remote 1) Select the correct brand for remote to be programmed by moving dip switches UP or DOWN. For example 433,92Mhz Marantec remote controls, just move Dip-switch 7 UP. 2) Press the learn button. The will LED turn on. 3) Press the button on the remote, the LED flashes 4 times. It means that remote control was programmed successfully. 4) Repeat step 2 for another button. 5)The 2-nd channel programming procedure is the same. Erase all data from the memory card: Press and hold either learn button. The LED will start flash. Keep this button pressed, until the LED will turn off. All saved data in the memory card will be erased permanently and can not be recovered Suitable for many brands of remote control receivers Friends, the remote control does not include batteries.