Ajax Wireless Security Touch Keypad "KeyPad", White//https://ajax.systems/products/keypad/Installation method: IndoorsCompatibility: Operates with all Ajax hubs, and range extendersNumber of buttons: 15Duress code: YesUser Passcode: YesProtection against passcode guessing: YesArming/disarming indication: YesPower supply: Battery: 4 ? ААA batteries, 3 V (batteries are installed in pairs)Battery life: Up to 2 yearsTemperature sensor: AvailableOperating temperature range: From -10°С to +40°СPermissible humidity: Up to 75%