Suitable for universal rods, the ordinary curtain changed to a smart curtain Hang and use, ordinary curtains become smart curtains in a second Lightweight and easy to install, don't need other tools Built-in 4000mAh, curtain machine low-power operation, to solve the charging troubles, 6 months of long companionship Specifications: No.: LY-1672 Product speed: 10m/s Type: Remote control dual-open rod Battery capacity: 4000mAh (2Pcs total: 8000mAh) Voltage: 3.7V Power: 14.8WH Endurance: 6 months Charging time: 8 hours Support rail type: rod Rod diameter range: 13-38mm Rod Installation condition: 1. If your curtains are perforated curtains, the top edge of the curtains to the ceiling needs to be greater than or equal to 40mm, and the shortest distance between neighboring Roman rings is greater than or equal to 95mm, using this product, you need to distribute the curtains evenly first, and then use the hauling rope and fixing clip. 2. If your curtains are hole-hanging curtains, the thickness of the hanging ring should be more than 4m. 3. This product is not suitable for rod curtains. 4. Rod diameter range: 13-38mm. 5. This product is only suitable for the thickness of the same Roman rod, not for telescopic Roman rod and other ends of the Roman rod with differences Package included: 2 x Curtains Opener with Accessories 2 x Charging Cable 1 x Dual Opening Remote Control 2 x Rope 1 x English Instruction Manual Other items not included