Function: timer, can set 30 On/Off programs one day or per week. Count down time, from1 Min to 23 hours 59 Mins With memory function, When the product contact is in the state, after the power failure, and then call, the product contacts still keep the state. Also can controlled by buttons from terminal Al and A2. Can be share with 20 peoples by Mobile App. In the App can display: Today Ele (K Wh), Current Ele (mA),Current Power (W), Current Voltage (V), Ele (KWh) Over current protection function:If the load is 16A,the product will cut off the load circuit automatically. NOTE: A ZigBee is required to work Note Order This item requires a ZigBee hub to work , if you already have it, 't need to buy , if you 't have it , buy it. Inrush current exceeding 16 amp will turn off the device. Make your load inrush current 't the 16 amp value. Product Name: ZigBee Smart Meter and Timer Rated Voltage: 110-240VAC 50-60Hz Rated Current: 16A Mounting: DIN Rail 35 mm Size: 86.5 x 17.5 x 70.5mm temperature range: -10- +60 APP: Tuya, Smart Life Wireless Protocal: ZigBee 3.0 color:White Material:plastic Package Contents: 1 x Smart Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.