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Bi-directional control valve: a valve to achieve bi-directional control of air inlet and outlet, simplifies the interior of the air blower, improves the sealing performance of the device and effectively prevents the suction of dust, resulting in secondary pollution. Long nozzle air blower: long nozzle is more suitable for: DSLR sensor, camera battery compartment and other cleaning position deep space. Also suitable for cleaning lenses, sensors (full frame and APS-C), filters, binoculars, microscopes, keyboards and other dusty electronic products. Extra large air output: improved airflow and 1.2 times higher dust blow efficiency, it can quickly blow away dust and impurities in a short time to keep the camera lens, housing and sensor clean. Silicone material: made of high-quality silicone, comfortable to touch, strong recoil, soft mouthpiece to better protect the equipment to avoid secondary injury to the device. Ergonomic design: Skin-safe anti-slip pattern design, comfortable grip, and the use of \