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This is a tiny video recorder and it looks like a Button. It's used for invisible video or audio recording with exact date and time stamping. The button camera simply connected directly with AV recorder and no outside power is needed for the camera.

A burr is a rough edge that's produced because of cutting process. It can be visible as well as invisible. For making an accurate part, burr removal is crucial.

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Features of JH-907 ITE Mini Hearing Aid Hearing Amplifier 1. The lightweight and easy operation, you won't feel anything after you wear, very comfortable; 2. Corresponding uncomfortable threshold properly adjust the maximum output, protect ear， low distortion; 3. 3 different earplugs are provided, which can fit different people's ear; 4. Mini ITC hearing aid type with small, it is even not as big as a fingertip, so that can it will be invisible after wear. 5. Beautiful design with a useful pulling line to take out the hearing aid from the ear, some hearing aid may too small to take off after using, with this pulling line, the user can be easy to take it; 6. The experienced manufacturer producing and factory directly sell, reasonable price, high quality. Precautions of JH-907 ITE Mini Hearing Aid Hearing Amplifier 1. Adjust volume to the minimum level or switch off before wearing. 2. To choose the right size of ear tips to avoid any extra noise. 3. Increase volume gradually to avoid the sudden increase in sound. 4. If you hear a howling, check the ear (silica gel) is appropriate and whether the size of the plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage. 5. Please regularly clean the earplugs in order to ensure the normal use of hearing aids. 6. Use for long periods of time, please remove the batteries to prevent rot erosion hearing aid components. 7. Keep out of reach of children. 8. The device is not water resistant.

They are used to detect radiation, which is invisible to human eyes, and capture it. SWIR cameras, such as cooled and uncooled cameras, are extensively used in the residential, commercial, military, and industrial manufacturing sectors, because of their low price, lightweight quality, and low-power

A monitoring software tracks both iPhone and Android phones. It works in an invisible mode so that the user under surveilence will never come to know aboout it.WIth this app, we can keep a secret eye on someone's Whatsapp converstion.