Auto lock screen to prevent misuse: If not operated for 30 seconds, unlock by long pressing the 'C/R' key. 28 timing groups, with a maximum timing of 168 hours, customizable settings High power relay with sufficient copper coil transformer No need to reset time after power loss; built-in large capacity rechargeable lithium battery Flame retardant PC material, consistent internal and external safety design Specifications: Color: White Voltage: 380V/50-60Hz Control output: 25A (three-phase direct output) Timing settings: 17 ON/OFF cycles (per day/week) Setting time range: 1 minute to 168 hours Time accuracy: ±1 second per 24 hours Power failure memory: over 180 days (built-in 1.2V rechargeable battery) Installation size: 128 x 117 x 65mm Mounting method: Screw or 35mm DIN rail Weight: 0.45kg Package included: 1 x Programmable Time Relay