http://www.yuetsz.com/heating-....thermostat/wireless- China Wireless Thermostat manufacturers Production Introduction: ME618RHS have no wifi function, so it can't controlled by App. It's wireless, controller and receiver are connected via 433/868MHz radio frequency. Our products are 100% brand new, on the product screen has two layers of protective film, and the inside layer is extremely thin. If the product has scratches, please remove the outer protective film. Production Parameter: Current loading: 5A Wireless receiver: AC85~260V,50/60Hz Temperature setting range: 5-35鈩?/p> Temperature limitation range: 5-60鈩?/p> Sensor: built-in sensor Frequency band: 433MHZ Product details:China Wireless Thermostat manufacturers website:http://www.yuetsz.com/heating-....thermostat/wireless-