HP 435 Programmable Wireless Keypad (7N7C3AA) - Connectivity: Bluetooth 5.3, Color: Black, Programmable keys: Up to 9 programmable keys, Special keys: Calculator, LED indicator: Num lock, Battery indicator, Connection status, Battery type: 1 x AA, Battery life: Up to 24 months, Wireless range: Up to 10 m in open area