STSW150 150W Digital Smart WIFI 15V Low Voltage Transformer with Photocell & Timer IP65STS150 User Manual STS WIFI Controller Set Up This heavy duty Smart Wi Fi enabled 150 Watt stainless steel low voltage digital transformer is an energy efficient, safe, reliable outdoor transformer with 15V Output. It has a Plug in photocell and digital timer and also 40" Plug in 3 prongs cord is included. With its Wi Fi capabilities, you may connect your transformer to your phone and control it via Smart phone to add timers, Schedules, and much more.