Product Name: One Button Garage Door Wireless Wall Switch with Rolling Code Technology Model NO.: WWS Battery Type: Button Battery Material: Plastic Body with Meatal frame Voltage: 3.3V Transmission Distance: 50-100m Universal: Universal Certification: CE, TUV,Rcm Type: Button Signal Transmission: RF Remote Control Application: Household Appliances, Automatic Doors Color: White, Black, Grey Frequency: 433.92 MHz Code Type: Rolling Code Button: 3, 4 Buttons Trademark: OEM Transport Package: Carton Box Specification: RC01, 02, 03, 04, 05 Origin: China HS Code: 8526920000 Product Description 1, Q: How many doors can your wall switchcontrol? A: 1 / 3 button(s) wall switchhas 1 / 3 channels for 1 / 3 differentsignal paths, which theoratically can control multiple doors as long as the openers can receive the signal, so it can control at least 1 / 3 different doors at the same time.2, Q: Can your wall switch fit with other openers from other suppliers? A: Yes, as long as the opener's frenquency is 433.92Mhz and with open code.3, Q: Can I get samples from you? A: Yes, please contact with our sales.