1. Application: to control the smooth operation of radiotube, water pump, electric machines, ribbon diode, etc.2. Overview: This is a programmable digital timer with a range of 0.1s - 999h. You can set 2 time groups T1 and T2. With this timer, you can achieve the following effect,A. You can let your instrument start working or stop working after a certain time. Choose T1 / T2 = 0.B. You can let your instrument run intervally. This let it work for a while, then stop for another time, and then start working again.C. You can choose your instrument to stop working for a while, and then start working for another time. Then it will stop and never work again.3. Function List:P1-1: relay switch on, after time delay t1. P1-2: relay switch off, after time delay t1. P1-3: after time delay T1, the relay turns on; Then the relay shuts down after a delay in time t2. P1-4: after time delay T1, the relay shuts down; Then the relay turns on after the time delay t2. Do.Q1-5: after time delay T1, the relay turns on; Then the relay shuts down after a delay in time t2. The cycle will be repeated. P1-6: after time delay T1, the relay shuts down; Then the relay turns on after the time delay t2. The cycle will be repeated.4. User Instructions:Set key: hold it for 2 seconds to enter the function settings. Press it to switch between the function code and set the parameter for them. Plus: add timeMinus: minus timeConfirm key: Start/Stop5. Use the decimal point to set the unit description:X X.X the decimal point is the tenth, time range: 0.1 seconds - 99.9 secondsXXX without the decimal point, time range: 1 second - 999 secondsXXX. The decimal point is at the end, the time range 1 minute - 999 minutes. XX.X. One decimal point is at the end, the other tenth, time range 1 hour - 999 hours.6. Specification: Material: PCB + Plastic Type: Time Relay Output Power: For DC/AC load control within 5AU Time Setting Range: 0s - 999 hours Optional Working Voltage (DC): 5V, 12V, 220V Measurement: 79x42x28mm(3.11x1.65 x 1.10in) Quantity: 1 Pc7. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!8. Package Includes:1 x Time Relay