Timeguard NTT08 7 Day Slimline Electronic Immersion Heater Timeswitch\r\n- Special easy slide programme cover to prevent accidental programme changes.- 4 ON/4 OFF easy-set programme periods per day, 28 ON/28 OFF programmes per week.- Self-cancelling override button to next programme change.- Extra large Easy View screen with blue LED backlighting.- Red LED Mains ON and green LED Output indicators for easy viewing.\r\nThe Timeguard NTT08 7 Day Slimline Electronic Immersion Heater Timeswitch is an easy to use digital timer, designed for wall mounting. It can control outputs of up to 16A which makes it suitable for domestic immersion heaters. The NTT08 comes with a link in place which can be removed to provide volt free contacts if required, making it suitable for a wider range of switching applications\r\nFeatures:\r\n- 6(4)A load rating.- Large easy push programme buttons.- Optional 1 and 2 hour boost button.- Automatic Summer/Winter changeover.- 720 hours rechargeable memory back-up.- Shortest switching time 1 minute.