Open Machine:  Long Press button more than 3 seconds 

Wireless ；2 batteries included

Wireless models:

Working voltage: 7.4V

Range of use: dual-use for car and home

Rated power: 40W/50W

Battery capacity: 2000mAh

Adjustment: two-speed adjustment

Suction strength.5000pa

Charging time: 1.5h

Life time: 20-30 minutes

Dust cup capacity: 0.2L

Description: The product has CE, FCC and RoHS certification