Remote control at anytime from anywhere by TUYA app on mobile ,no distance limit. Schedule /Timing, countdown, cycle timing Voice control by for Amazon dot and Google assistant Into Smart With Your DIY ; Remote control by mobile phone ,Tuya Smart Edition Timing Mode / Countdown Mode Notice: The Black with meter function 1.Remote control at anytime from anywhere 2.Timer ON/OFF 3.Scene setting,home scene(Turn on the light, turn on the water heater, turn on the TV, turn on the conditioner,), going out scene(Turn off the lights, turn off the water heater, turn off the TV, turn off the conditioner, etc.) 4.Sharing devices with family and 5.18 mm Din Rail instal Parameter: Working voltage:AC90-230V,50/60Hz Current: 40A Wireless type:Wi-Fi 2.4GHz Support system:for Android/iOS size:82x50x18mm Material:ABS colour:White + Black Package Contents: 1 x Circuit Breaker (The batches are different, and the character batch numbers on the products may be different, which does not affect the ) Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.