Ajax Wireless Security Touch Keypad "KeyPad Plus", Black, encrypted contactless cards and key fobs//https://ajax.systems/products/keypad-plus/Installation: Indoor onlyCompatibility: Hub Plus, Hub 2, Hub 2 Plus, Hub Hybrid, ReX with OS Malevich 2.11 and higherPersonal passcodes: YesPasscode guessing protection: YesDuress code: YesContactless access: DESFire® EV1, EV2; ISO14443-А (13,56MHz)Power supply: Batteries: 4 lithium AA (FR6); Voltage 1.5VBattery life: up to 4.5 yearsTemperature sensor: AvailableOperating temperature range: From –10°C to +40°COperating humidity: Up to 75%