Movo WMS80 37" Wireless Motorized Camera Track Slider Video Stabilization System for Cinema Film and Time Lapse Photography Adds motorized sliding to your video or time-lapse stills Variable speed control, 11-pound weight capacity Powered by 4 18650 type rechargeable batteries (3 for unit, 1 for wireless controller) The batteries and charger are sold separately. **PLEASE NOTE** #1) Slider cannot be operated manually #2) Motor noise can be picked up by camera's mic. Use of external microphone is recommended. 1 Year Warranty