1. Power supply: 6VDC 2 CR2032 (230mAh) lithium batteries2. Battery life: about 2 years, calculated based on 10 times per day3. Operating frequency: 433.92 MHz +/-75KH4. Transmit power: about 1mW5. Coding format: HCS301 standard formatOperating temperature: -10-+55Number of password digits: 0 to 8 digitsTransmit distance: 200 meters in open space; 35 meters indoorsProtection level: IP56Automatic 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 description:Prompt soundState indicated1 short "beep"Key sound1 long "beep"Password change successful (or code transmission)5 short "beeps"Password error or enter the password change state2 low-pitched "beeps"Battery low voltage alarmLow voltage alarm: When the battery voltage is lower than 4 volts, 2 low-pitched "beeps" are emitted each time the key is released.Colour:As ShownMaterial:plasticPackage Contents:1 * gate door openerOnly 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.