Specifications: Timing range: 0-999s, 0-999m, 0-999h. Supply voltage: AC110V-220V. Relay: 20A. Working current: 10A (max). Power: 500W (max). Size: 79*26*43mm. Hole size: 72*40mm. Instructions: For first use, please wait 6 seconds after setting data; the module will save the set data after 6 seconds. Short press SET button: Enter time setting mode. The display will blink. Adjust time T1 and T2 using the + and - buttons. After setting, wait 5 seconds for the module to save the data. Long press SET button: Enter parameter setting mode. Two parameter groups are available: P0 and P1. Switch between P0 and P1 by short pressing SET. Use + and - buttons to set timing mode under each parameter. P0--0: Timing mode: 0-999 seconds. P0--1: Timing mode: 0-999 minutes. P0--2: Timing mode: 0-999 hours. P1--0: Relay connects after delay of T1 time. P1--1: Relay disconnects after delay of T1 time. P1--2: Relay connects after delay of T1, then disconnects after delay of T2; cycle ends. P1--3: Relay disconnects after delay of T1, then connects after delay of T2; cycle ends. P1--4: Relay connects after delay of T1, then disconnects after delay of T2; continuous cycle. P1--5: Relay disconnects after delay of T1, then connects after delay of T2; continuous cycle. Example: For a 10-second on and 20-second off cycle: Set T1 = 10, T2 = 20. Set P0--0 (T1 time unit in seconds). Set P1--5 (cyclic timer mode). Package Included: 1 x Digital Display Time Relay