Feature: 1. Can be used for street lights, factories, advertising signs, production equipment, radio and television equipment, stage and other power equipment that needs to be turned on and off regularly. 2. Set the start clock of each group, the running time of each group is the same, the setting range is 1-99 seconds. 3. Time-controlled ringer, 40 groups. 4. Long life, no less than 10,000 times of electrical life. 5. 1.6 Inch large screen display, the reading is more convenient and clear. 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.