Can I use this to inflate water balloons (filling water)?

No, it's only designed for Air.

How do I activate deflate feature?

Hi, please keep holding the "-" button, the deflate function will be activated in about 2 seconds later. And there will be a "OUT" sign displaying on the left bottom of the LCD screen. Hope this answer can help you, thank you

It is possible to inflate a ball at 4.25 psi??

In PSI, pump has increments in tenths up to 10PSI. From 10PSI upwards, increments in ones.

Can this be used on bike tires?

As you can see all the images come along with the package and all the extended and inflation hoses , pins . I do believed and trusting will do the job perfectly with the extension hose . Thank you for contacting and hope you'll support this amazing device and passing a long .

Color	Blue-Purple
Brand	Pumteck
Material	Metal
Item Weight	0.55 Pounds
Product Dimensions	6.29"L x 1.57"W x 1.57"H
Power Source	Battery Powered
Maximum Pressure	15 Pound per Square Inch
Operation Mode	Automatic
Manufacturer	Pumteck
Battery Type	Lithium-ion
Item Package Dimensions L x W x H	6.93 x 2.99 x 1.81 inches
Package Weight	0.36 Kilograms
Item Dimensions LxWxH	6.29 x 1.57 x 1.57 inches
Brand Name	Pumteck
Model Name	MY01
Suggested Users	unisex
Number of Items	1
Part Number	MY01
Style	Cubic
Included Components	1* MY01 Electric Ball Pump, 1* USB Cable, 1* User Manual, 2* Ball Needles

Pumteck MY01 Electric Ball Pump

Details

Description

Specifications

Common Questions