Specification: Item Type: Curtain Switch Material: PC+ABS Color: Black Product Size: Approx. 12x7.5x3.2cm / 4.7x3.0x1.3in Weight: Approx. 172g / 6.1oz Product Voltage: 95-250V/AC Rated Current: 10A Wireless Standard: WiFi (2.4G 802.11 b/g/n) Control Distance: Unlimited (under 2G/3G/4G/WiFi network) Applicable System: for IOS 8.1/Android4.1 and above App Language: Adaptive Chinese/English/Korean/German/French/Spanish/Italian/Arabic Control Method: Touch, voice control, mobile APP three-in-one multi-function control Package List: 1 x Switch 2 x Screw 1 x Instruction Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Automatically calculate the travel time required for the full opening and closing of curtains of different sizes, and support precise voice commands or progress bar percentages to open or close the curtains. The user can open or close the curtains in percentage according to the scene.