【Powerful Duster & Deep Cleaning】 It can be used for most devices，it is used for cleaning away the smallest dust particles in the high-precision instruments. This duster helps you clean up air conditioners, pet's hair, printed circuit boards, medical devices, relays, contacts and connectors, computers, laptops and keyboards, switches and solenoids, electrical equipment, laboratory instrument, telecommunication equipment to electronic instruments and so on. Instructions for use 1、After the product arrives, please fully charge the product first 2、Connect thenozzle in large diameter directionto the product 3、Long press more than 3s to start For more detailed operating instructions, please refer to the manual