Features: Upgraded Heat Emission Holes DesignThe addition of the heat emission holes at both side can help the auto dolly to cool down quicker during working, which give longer life to a new generation of camera video dolly. Mobile APP ControlSupports mobile phone APP wireless remote control, you can scan the OR code on the users manual to download APP, which is compatible with Android/ iOS smartphone system, and remote control distance is up to 8M without interference. Multiple Photography ModesSupports time-lapse photography, parameter customization selection; can be placed on desktop or a flat surface for straight-line/ curved-line photography; supports video automatic loop recording without frequent operation, and A-B point positioning photography. Stepless Speed AdjustmentMaximum speed is up to 10cm/s, and the speed is adjustable for 0%-100% steplessly; adopts stepping motor, precise control and low noise, close-range video can be recorded quietly. Built-in Rechargeable BatteryBuilt-in 1800mAh rechargeable Li-ion battery can offer up to 4 hours service time after being fully charged; you can charge the battery via the type-c charging port and charging cable is provided. Wide Compatibilitymax. 3kg load capacity and comes with a 1/4 inch & 3/8 inch mutual screw, the auto dolly can work with DSLR/ILDC camera, camcorder, sports camera, mobile phone, etc. And the APP's shutter button supports most mirrorless camera. Specifications: Brand: Andoer Model: L5i Pro Material: Plastic Load-bearing Range: max. 3kg Battery Capacity: 1800mAh Charging Time: About 3H Working Time: about 4H after fully charge APP Remote Control Distance: max. 8M(without interference) Speed: max.10cm/s, Speed Adjustable 0%-100% Item Weight: 446g/ 15.7oz Packing List: 1 * Auto Dolly 1 * USB Charging Cable 1 * Mutual Screw 1 * Rubber Ring(large) 1 * Mini Wrench 1 * Users Manual(English & Chinese)