The L4X Motorized Camera Dolly from YELANGU, in black with orange accents, runs on a flat surface and can make straight, curved, or 360° circular moves. This dolly is designed to work with DSLR and mirrorless cameras weighing up to 6.6 pounds/ /3kg. It includes reversible 1/4"-20 to 3/8"-16 threaded stud mounts for your camera or ball head and can support smartphones with a separately available Smartphone clamp. Dolly features include three selectable speeds, direct control, and an included remote control with a range of up to 19'. The L4X dolly's compound wheels will work on flat surfaces and are compatible with most 31.5 to 47" slider tracks. The adjustable wheelbase enables the dolly to ride on slider tracks with varying distances between the rails. You can adjust the angles of two of the wheels to create circular moves, and these angles are indexed for repeatability. The L4X dolly has both 1/4"-20 and 3/8"-16 threads for mounting a pan head or accessories. It comes with a reversible camera stud, a remote controller, a USB charging cable, a spare O-ring, and an Allen key. Key Features Supports DSLRs, mobile phones, small camcorders, and mirrorless cameras up to 6lb The remote control features start/stop, direction and speed selection push buttons that works within a distance of 6 meters. Straight, Curved, or 360° moves The runtime of up to 6.6 hours with three selectable speeds Includes a reversible 1/4"-20 to 3/8"-16 camera stud Two-part wheels enable the inside wheels to run on the slider track, while the outside wheels help guide the dolly along the track Create adjustable-size circular moves on a flat surface; the hinged wheels feature an indexing system for aligning the arms to complementary angles Indicator lights on the dolly's body light up to confirm power and speed selection One 1/4"-20 thread and one 3/8"-16 thread for mounting a pan head or accessories Compatible with most 31.5 to 47" Sliders Specs Material of Construction Anodized Aluminum AlloyABS Plastic Finish Black with Orange Accents Load Capacity 6.6 lb / 3 kg Mounting Threads 1/4"-20 and 3/8"-16 Speed 1.2" / 3 cm per Second0.9" / 2.4 cm per Second0.6" / 1.4 cm per Second Slider Travel 31.5 to 47" / 80 to 120 cm Remote Control Range: 20' / 6 mBattery Type: CR2032Runtime: 18 Hours (Approximate) Standby Time: 6 Months Charging Micro-USB Port on Dolly Chassis Runtime 6 Hours (Approximate) Dimensions 6.5 x 4.7 x 1.3" / 16.5 x 12 x 3.2 cm Weight 1.25 lb / 567 g