Small Size Module , Easy to Install Rated Voltage:100-240V AC 50/60Hz WiFi Frequency:2.4GHZ Ambient Temperature Range:-10°C ~ 55°C In the APP It Can Display: Hourly Elec. (KWh) Today Elec. (KWh), Monthly Elec. (KWh) Yearly Elec. (KWh) Current Ele(mA), Current Power(W), Current Voltage(V), Total Ele(KWh) Colour:White CT Transformer cable: random colors, 't accept the specified color Material:plastic type:B:1 to 2 (120A) Package Contents: 1 x Bilateral WiFi Energy Meter 2 x CT Transformer( 120A) 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Smart Bilateral Energy Meter WiFi Energy Meter Two-way Bilateral WiFi Energy Meter