Features: Installation method is screw, connector connection. Key Button: 1.clock, timer, day, h+(setting the hours), m+(setting the minutes), manual override, reset. Tips: 2.Before starting the program, the timer should be charged for at least 5 minutes as the inbuild battery may be of no battery. 3.Before setting the program, press the key button reset, to clear the memorize data for the new instructions. 4.After the program is made, please insert the timer to the plug. Then connect the electric appliance to the timer. 5.The on and off can be set eight times each day, which can be set as follow: First option, Sunday. Second option: from Monday to Friday. Third option: Saturday and Sunday(weekend). Fourth option: from Monday to Saturday(working days). Fifth option: Monday, Wednesday, Friday. Sixth option: Tuesday, Thursday, Saturday. Seventh option: from Monday to Wednesday. Eighth option: from Wednesday to Saturday. 12 hours and 24 hours systems are optional. Description: Theory: Digital Type: Mini Cut out (MM): 64 Fitting Depths (mm): 21 AC: 12v Power : 12V DC/AC 16A(8)A.240V AC Current consumption without load : 0.015mA Specification: Resistive Load (LVD .IEC) 16A /240V AC. Inductive load cos . 0.6 8A /240V AC. incandescent lamp load 1000W. SWITCHING CURRENT DC : 16A/24V DC. Operation accuracy : Type(+-)1 s/day. Ambient temperature : -10-55. Shortest switching time : 1 min. Shortest switching interval: 1 min. Number of channels 1. Number of memory spaces : 17. Type of connection : Plug in. According to: EN60730-1. Item size: 61*59*31mm Packaging size: 70*67*44mm Net weight: 79g Packaging weight: 88g Colour: White Packing content: 1 x Programmable Timer Switch