The TGBT4 is a boost timer for immersion and room heaters. Simply press the button to increase the ON time for up to 4 hours. Features: 13A (3kW) loading Easy to use push button control Power status LED indicator illuminates boost button ON time can be increased in 4 steps: 025, 050, 1 and 4 hours Fits standard flush or surface mount boxes min 25mm deep Specifications: Timer Mode: Boost Setting Type: Digital Switch Rating 230V AC: 13A Resistive (3kW) Operating Temperature: -10 to 40ºC Cable Connection: 1.5 × 2.5mm 2 Flexible Cable EC Directives: Conforms to Latest Directives Dimensions: Height: 85mm x Width: 85mm x Depth: 31mm