One to one key copy,Each key password alone save Can continuous repetitive copy use times Privacy is strong A replacement for garage door remotes. Multi-functional and multi-variable, personalized and user-friendly simple design and fast to use. Rated voltage: 3 V Installation: wireless Corresponding frequency: 280-868mhz Learning frequency range: 300MHz ,306MHz ,310MHz ,315MHz, 315.5MHz ,330MHz, 360MHz ,390MHz, 410MHz, 430.5MHz, 433.42MHz, 433.92MHz, 868.35MHz, 286-361MHz, 384-400MHz. Scope of application: garage door, alarm, automatic door, rolling door, etc. Suitable for 99% of remote controllers on the market. Color: A:Black Material: plastic Package Contents: 1 x Garage Door Remote Control(With keychain) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.