CN101S 1 Second Interval Digital LCD Timer Switch 8 ON/OFF Programs Per Day, 15 Combinations to a Week 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 unit count: 1.0 Functions: 1.Clock display(12hr/24hr format) 2.Timer ? ?Features: 1.Easy to read LCD display, LED indicators. 2.Minimum 1 second interval. 3.8 ON/OFF programs per day, 15 combinations to a week. 4.24 hours / 7 days a week programmable. 5.Countdown function. Max 24 hours countdown to OFF. 6.Built-in rechargeable battery for saving the memory when power failure. 7.Repeat programs with 8 on/off settings, and setting on/off manually. 8.Ideal for household use in panel mounted. Product Parameters: 1.Power supply:220V AC 50/60Hz 2.Max load:16A 3.Min interval:1 second 4.Timing range:1 second to 168 hours 5.Setting groups:8 ON/OFF per day 6.Programs:15 Groups 7.Black-out:60 days 8.Installation:Panel/wall mounted