One to one key copy, each key password saved separately Can be continuously and repeatedly copied up to one million times Strong privacy protection A replacement for garage door remotes Multi-functional, versatile, and user-friendly with a simple, fast design Rated voltage: 3 V Installation: wireless Corresponding frequency: 280-868 MHz Learning frequency range: 300 MHz, 306 MHz, 310 MHz, 315 MHz, 315.5 MHz, 330 MHz, 360 MHz, 390 MHz, 410 MHz, 430.5 MHz, 433.42 MHz, 433.92 MHz, 868.35 MHz, 286-361 MHz, 384-400 MHz Scope of application: garage door, alarm, automatic door, rolling door, etc. Suitable for 99% of remote controllers on the market Color: A: Black / B: Silver Material: plastic Package Contents: 1 x Garage Door Remote Control (with keychain) Only the above package content is included; other products are not included Note: Light reflection and different displays may cause slight color variations between the item in the picture and the actual item. Measurement allows an error of +/- 1-3 cm