The smart switch also supports timing and countdown, which is multifunctional and practical. The smart switch supports APP control and voice control, which allows you to turn on or turn off the light or other appliances remotely. Made of ABS and PC, the smart switch is safe and eco-friendly to use. The length of the smart switch is 4.2cm, width is 4.2cm and height is 2cm. The smart switch is compatible for Android and for Apple. It is suitable for Amazon Alexa, for Googles Home Assistant, for IFTTT and so on. Item Name: Smart Switch Material: ABS,PC Model: Tuya Input Voltage: AC100-240V Maximum Load Current: 16A WIFI Standard: 2.4gHz 802.11b/g/n Working Temperature: -20-50 Degrees Celsius Applicable System: for Android, for Apple Features: Intelligent, Voice Control, Mini Size Details: 4.2cm x 4.2cm x 2cm/1.65" x 1.65" x 0.79" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Equipment installation and fault maintenance must be performed by a professionally qualified electrician to avoid the risk of electric shock! The equipment should not be touched under normal use. Package Includes: 1 x Smart Switch 1 x User Manual