Portable and Handheld Design: with small size and light weight, easy to carry. Removable bottom design, you can push the bottom when you need to clean the vacuum, it is easy and fast to clean. Power supply: 2xAA batteries (Not include). Use with the battery (AA UM3 1.5V) voltage DC 3.0V. Do not clean the vacuum with water, oil benzene, or it will damage the motor. Do not remove dust with iron bits, glasses or other sharp scraps. Or it may stuck the motor.