1. The third gear speed regulation is 2 revolutions-4 revolutions-6 revolutions per minute respectively 2. The maximum load is 4KG-3KG-2KG according to the different rotational speed. 3. Forward and reverse function. 4. Set the round-trip rotation function according to the rotation angle, and the round-trip rotation angle can be set as 45-90-180-360 degrees respectively. 5. There are four power supply modes to choose from, which are USB direct-plug AC power supply, USB power supply connected to power bank, three ordinary AAA batteries, and 18650 rechargeable lithium battery. 6. Switch description Reminder that this product is not equipped with a battery, if you need to charge it, please use it with a 18650 flat-head rechargeable battery. 1. Power on: any key to power on, short press to operate. 1.Power ON: touch any keys. 2.R/L: switch clockwise and counterclockwise, short press to operate. 2. R/L: switch to clockwise or counterclockwise. 3.SR: Speed switch, 2, 4, 6 laps per minute, short press operation. 3.SR: speed regulation, 2r/4r/6r/min. 4. A S A: Angle switching, 45-degree round-trip, 90-degree round-trip, 180-degree round-trip, 360-degree round-trip, short press operation. 4.ASA: angle regulation, 45/90/180/360 circulation. 5.IN 5V: MicroUSB 5V external power input. 5.IN 5V: MicroUSB 5V DC IN. 6. Shutdown: any button to shut down, long press for 3 seconds to operate. 6.Power OFF:long press any keys for 3 seconds. 7.18650 lithium battery or 3 AAA batteries for power supply, (battery not supplied) 7.1865 lithium battery or 3 AAA battery(not include). 8.18650 charging status indication, the IN 5V port is charging with diffused red light, and the IN 5V port is fully charged with diffused green light. 8.Charge LED indicator(built-in): red-charging, green-fully charged.