Feature: This product adopts the emerging zigbee technology and professional manufacturing process Remote control at anytime from anywhere by TUYA / Smart Life app on mobile ,no distance limit. Schedule /Timing, countdown, timing Voice control For / Google assistant / Yandex Parameter: Support system:for Android / iOS Notice: Wiring: Power must enter from the top and must be Live line + Neutral Line (L+N). Live line + Live line (L+L) cannot be used. This model with power meter function This model have NO overcurrent protection, can not set current ,voltage in APP. Different batches may cause differences in product appearance, color and words, which will not affect the use. size: 82 x 50 x 18mm : plastic colour: white + black Package Contents: 1 x Circuit Breaker(40A) 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.