The pump has five pressure gears which enables you to see the exact pressure inside so you can repeat the perfect amount any time you like . 

You can adjust the pressure until you are comfortable when you enlarge your penis with this Erector.

After you\'re done with this pump, the quick release purge valve makes it easy and safe to remove.

It is more Stable and reliable with USB rechargeable,you don\'t worry about it is no power when you use it after charging.

Function:  Pumps & Enlargers

Color: Black/White

Size: 25 * 7 cm/9.8\" * 2.8\"

Pressure gear: 0,-10 KPa,-20KPa,-30 KPa,-40 KPa,-50KPa

Max. pressure:-50 KPa

Power: lithium battery

Material: ABS + Silicone + TPE

Package: Color Box

Further: Vacuum hydraulic technology, the penis erection safer and more comfortable.

Package Size: 30*8*8 CM