Blackt Electrotech 16A/240V AC Digital LCD Display Programmable Control Counter/Relay Timer Time Switch: DIN Rail: This timer switch can automatically turn on/off all kinds of electrical equipment according to the time set by the user. It has a built-in rechargeable battery and an industrial grade chip with high precision and strong anti-interference ability, the timer switch is ideal for controlling street lamps, neon lamps, production equipment, radio and television and many other household appliances. Package Includes:1 x Timer Switch,1 x User Manual. Specifications: Contact Voltage: 16A 240V AC (50/60Hz), On/Off Operation: 16 On and 16 Off (Manual/Auto), Display: LCD Power: 4.5VA (Max. ), error: =2s/day (25), mounting method: DIN rail (not included), binding: 1 min to 168 hours, operating temperature: -10? To 55? Dimensions: 86 x 36 x 65 mm. Instructions: 1. When you use the timer switch for the first time, input AC and charge the built-in battery, then press the reset button. 2. The timer switch is in 24-hour mode as default. Press and hold the time button (bottom left, next to restart) for 5 seconds until it shows AM to set the 12-hour mode. Press and hold the time button for 5 seconds to return to 24 hours mode. 3. Full time clock setting (see more in user manual).