433MHz Wireless 2-Channel Garage Door Receiver — Compatible with All Rolling Codes

Ultra-compact garage door receiver — the smallest on the market. Operates at 433MHz and supports all rolling codes. Hardware includes two relay channels plus an onboard buzzer. Memory can store up to 819 remote controls, and individual remotes can be deleted even when the remote is not present. Three selectable operating modes: bistable with reset; tdjn (output active only while the button is pressed); and monostable adjustable from 1 ~ 999s, with 1s.