Specification: Item Type: Timer Switch Model: TM624 Power Supply Voltage: 50Hz AC220V Conventional Thermal Current: Ith 16A Rated Working Current (Ie): AC-15 220V 3A Timing Error: No more than 1s / d Power: 1.5W Display: 1.6 Inch display large screen Amplification Time: 1s ~ 99s Bell Group: 40 groups Electrical Life: Use no less than 10,000 times Installation: 35DIN rail mounting or screws Battery Type: Ni-MH battery Battery Model: NI-MH40H Battery Nominal Capacity: 40mAh Scope Of Application: Street lights, factories, advertising sign lights, production equipment, radio and television equipment, stage and other power equipment that need to be turned on and off regularly. Package List: 1 x Timer Switch 1 x English Manual Note: Due to manual measurement, there are slight errors, thank you for your understanding.