Feature: 1. Screw Adapter: With standard 1/4in and 3/8in screw holes on main body, can be used with various types of ball head, mobile phone clip and camera with the included 1/4in and 3/8in screw adapter. 2. Phone Clip Description: Phone clip is made of aluminum alloy, durable, has cold shoe base, can be installed to fill light, microphone and other devices. Knob can adjust the clamping width of phone clip, range of 6.5‑8.5cm/2.6‑3.3in. 3. Compatible Devices Maximum load bearing is 3KG/6.6lb, can be used for SLR camera, mirrorless camera, mobile phone, motion camera, suitable for Vlog, video shooting. 4. Powerful Feature: Wireless remote control with a distance range of 6m/19.37ft, support 3 speed gear adjustment, can use straight line shooting, support forward and backward moving, similar to electric slide, can achieve curve shooting, 360° uniform rotation shooting. 5. Wide Use: Can work on the horizontal ground, desktop, suitable for a variety of scenes, flexible use; Also has a compact size, foldable design makes the dolly portable. 6. Camera Dolly Battery: Camera dolly has built in 1800mAh battery, can be used for 6 hours with maximum power, USB charging interface, input 5V 2A, easy to charge. Specification: Item Type: Camera Dolly Material: Aluminum Alloy Application: For Video, Vlogging, Movie Weight: Approx.716g/1.6lb Car Speed: First Gear: 1.4cm/s(0.6in/s) Second Gear: 2.4cm/s(0.9in/s) Third Gear: 3.0cm/s(1.2in/s) Maximum Load Bearing Capacity: 3KG/6.6lb Wireless Remote Control Distance: 6m/19.37ft Maximum Continuous Use Time: 6 Hours Battery Charging Time: 3 Hours Remote Control Duration: 18 Hours Remote Control Normal Use: 60,000 Times Camera Dolly Battery: Built In Lithium Battery, 1800mAh (Built In Battery) Remote Control Battery: Button Battery CR2032, 240mAh (Built In Battery). Package List: 1 x Camera Dolly1 x Mobile Phone Clip1 x Remote Control1 x Charging Cable1 x Adapter Screw1 x Rubber Ring1 x Wrench1 x Manual Note: Please allow 1‑3cm error due to manual measurement. Thanks for your understanding.