[Wifi+Bluetooth Dual Mode] Connect faster with dual-mode technology. The connection speed is 2 times faster than Wi-Fi-only models. (Wi-Fi models have this function; Zigbee does not support this feature) [40A Rating] Suitable for air conditioners and other high-power appliances. Please observe the maximum power rating. [Requires Neutral Wire] Installation requires a neutral wire for safe and stable operation. [Offline Function] When the device is offline, the app will notify that the device is disconnected after 30 minutes. [APP Remote Control] Control the switch anytime, anywhere via the mobile app. [Voice Control] Works with Alexa and Google Assistant, Tmall Genie for voice control. [Set Timing] Schedule connected devices to turn on or off at specific times. For example, schedule a fan to turn on in the morning or children's lights to turn off at bedtime. [3 Restart Modes] Choose from default on, default off, or memory status after power recovery. [Backlight Option] Adjust the backlight setting to minimize disturbance during nighttime use. (Available on Wi-Fi models; not supported on Zigbee models) [Family Sharing Function] Share control with family members to create a smart home environment. [Sharing Function] Invite family members to share control of the device. [Group Function] Control multiple devices together as a group for easier management. EU Product Dimensions: 86 x 86 x 35mm Wi-Fi Standard: 2.4GHz 802.11b/g Panel Material: Tempered glass Rated Current: 40A Input Voltage: AC 220V, 50/60Hz Color: Black Material: ABS Package Contents: 1 x Water heater switch Only the above items are included; other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement tolerance: +/- 1-3cm.