Product Name: Wireless 433 MHz Garage Door Motor Sun Visor Remote with 3 Buttons Model NO.: SVR 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 sun visor remotescontrol? A: All of our remotes have three controlling buttons,each one of them has its own signal path, which theoratically can control multiple doors as long as the openers can receive the signal, so our remote can control at least 3 different doors with three different buttons at the same time.2, Q: Can your sun visor remotes 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: What if the battery of your remotes out of power? A: We use standard CR2032 button cell, which can be easily bought from any market.4, Q: Can I get samples from you? A: Yes, please contact with our sales.