Inhouse product
1. Free lift for a wider variety of rood surfaces.
2. Each tire consists of a number of small rollers.
3. The spray can be controlled by remote control while the vehicle is running.
Lithium battery (with protection USB charging): 18650 3.7V 1200 mA
Use time: about 40 minutes
Charging time: about 45 minutes
Remote control distance: about 50 meters