Genuine Optimum Wifi Universal Boiler Module / Immersion Heater Control (OP-BM/IHTWF01, OPBMIHTWF01, OP-BMIHTWF01) WiFi Universal Boiler Module or Immersion Heater Control by Optimum, part of the Tower / Grasslin Group. Remotely programmable via the users home WiFi hub and a smartphone app. Via the App it can be programmed for a timed switching sequence on a 24 hour or 7 day basis. It controls a volt-free switch with a resistive rating of 16 amperes. The WiFi Module can be easily removed from the enclosure and directly mounted inside boilers with suitable timer apertures. Additional WiFi switches can be added to the system a standard WiFi router has capacity for up to 15 devices. Devices can be grouped, and work with either Amazon Alexa or google home. Security is military grade A.E.S. encryption, with dynamic key allocation and an https encrypted channel.Specification:Surface mounting24 Hour / 7 Day programmingDay group programmingTimed On/OffOverride On/Off button20 on/off programmesMinimum setting 1 minuteCountdown Function: Countdown ON or OFF16 Amp resistive, 4 Amp inductiveVolt free SPDT contactsWLAN 802.11 b/g/nSecurity: A.E.S. DYNAMIC KEYVolt free SPDT contacts (remove link)Earth park terminal and cable clampsNot suitable for discharge or LED lighting without a contactor