Ajax Wireless Security 6V PSU for Hub 2 / Hub 2 Plus//https://ajax.systems/products/6vpsu/Compatibility: Hub 2 and Hub 2 PlusRecommended batteries: Zinc air and alkaline batteries with 4.2-16 V operating powerInput voltage: 4.2-16 VOutput voltage: 4.8 V ± 5%Switch-on voltage: 4.2 V ± 2.5%Switch-off voltage: 3-3.4 V (depending on the load)Maximum input current: 2.2 A at 4.2 V; 0.5 A at 16 VMaximum output current: 1.5 APlugging in: Plug socket: 6.5 x 2 mm; Plug: 5.5 x 2.1 mmOperating temperatures range: From -10°С to +40°СOperating humidity: Up to 75%