Features: Panel mounted Advanced pre-setting one week before Digital electronic timer switch with daily and weekly programs Repeat programs with 17 on/off setting and manual override Lithium battery power reserve when electric supply cut off Specifications: Model: THC 15 A Voltage rating:12V DC Error correction: 1s/24h (25'C) ON/OFF operation: 17 ON/OFF Power consumption: 2W Display: LCD Minimum interval: 1 minute Power reserve: 60 days Power Supply: Built-in 1.24V 40mAh rechargeable Lithium battery Ambient temperature: -10℃-+40'C Ambient humidity: 35-85%RH