1. Power supply: 6VDC 2 CR2032 (230mAh) lithium batteries 2. Battery life: about 2 years, calculated based on 10 uses per day 3. Operating frequency: 433.92 MHz +/-75KHz 4. Transmit power: about 1mW 5. Coding format: HCS301 standard format Operating temperature: -10C to +55C Number of password digits: 0 to 8 digits Transmit distance: 200 meters in open space; 35 meters indoors Protection level: IP56 Automatic lighting: When the surrounding light is insufficient, the key input signal LED automatically lights up Automatic standby: When there is no key input signal for 10 consecutive seconds, the system automatically enters the power saving standby state Buzzer prompt Prompt sound State indication 1 short beep: Key press confirmation 1 long beep: Password change successful or code transmission 5 short beeps: Password error or entering password change state 2 low-pitched beeps: Battery low voltage alarm Low voltage alarm: When the battery voltage is lower than 4 volts, 2 low-pitched beeps are emitted each time the key is released Color: As shown Material: Plastic Package Contents: 1 x Gate door opener 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm