Feature: 1. Silent Mode: This intelligent curtain motor has a silent mode that makes your device's motor work at 25dB or less, allowing the curtains to drift slower and quieter to eliminate distractions, perfect for waking up in the morning, great for people with sleep disorders or sensitive to sound. 2. Good Compatibility: This automatic curtain opener has good compatibility, it is suitable for three kinds of tracks, and the curtains in your home can be used at will to support the type of rail such as Roman rod, U rail, and I beam rail. 3. Easy To Use: This electronic curtain opener is very simple to use, no changes or tools required to easily upgrade your curtains. You can just hanging off, installing the positioning magnet and connecting to our app. 4. Excellent ABS Material: This smart automatic curtain opener is made of excellent ABS material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life. 5. Wide Application: This electric curtain robot automatic opener has a wide range of applications and can be used in bedrooms, living rooms, offices, baby rooms and more. Specification: Item Type: Automatic Curtain Opener Material: ABS Roman Rod Diameter: Approx. 13-38mm / 0.51-1.50in U Shaped Track: Bottom Slot Width: Approx. 0-15mm / 0-0.59in Bottom Ring Width: Approx. 0-5mm / 0-0.20in I Shaped Track: Bottom Width: Approx. 5-40mm / 0.20-1.57in Bottom Ring Width: Approx. 0-5mm / 0-0.20in Speed: 10m/s Power Supply: 3.7V 4000MAH Lithium Ion Battery x 1 (Shipped With Built In Battery) Application: Suitable for three kinds of tracks, curtains at home with the support of the rail type such as Roman rod, U rail, I beam track. Package List: 1 x Curtain Motor 1 x External WiFi 1 x Pull Cord 1 x USB Data Cable 1 x Manual 1 x Screwdriver 2 x Roman Rod Accessories 6 x U Shaped Accessories 2 x T Shaped Accessories