The Lithium Battery 1100 DC Series (No Battery) is a compact and whisper-quiet solution specifically designed for indoor roller blinds with a minimum width of only 400mm. Operating at a mere 30 dBA, it features adjustable speed settings and advanced Bi-directional RF and Bluetooth protocols for seamless connectivity. This motor is powered by a high-capacity 2,500 mAh Li-ion battery with a modern USB-C charging port. For added convenience, it includes a low-battery LED alert and intelligent limit memory that remains saved even if the power is completely depleted.