Usage Tips:1.Easy to read LCD display, LED indicators. 2.Mimimum 1 second interval. 3. 8 ON/OFF programs per day, 15 combinations to a week. 4. 24 hours / 7 days a week programmable. Countdown function. Max 24 hours countdown to OFF. Built-in rechargeable battery for saving the memory when power failure. 5. Repeat programs with 8 on/off settings, and setting on/off manually. perfect for household use in pannel mounted. 1.Model number : CN101S-5V 2.Power supply:5V 3.Max load:16A 4.Min interval:1 second 5.Timing range:1 second to 168 hours 6.Setting groups:8 ON/OFF per day 7.Programs:15 Groups 8.Black-out:60 days 9.Average error: Less than 2 sec/day 10.Battery type:1.2V,inside,rechargeable 11.Installation:Pannel/wall mounted size:7.0 cm x 7.0 cm x 4.0 cm Material:ABS+electronic components colour:white Package Contents: 1 x TM618N-4 switch 1 x User Manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.