Application: Watches, calculators, children's toys/remote control cars, cameras/cameras, computer motherboards, doorbells, pet collars/toys, massager remote controls, air conditioner remote controls, pedometers, digital scales, digital timers, stopwatches, car keys, motorcycles Car alarms, keyless car remotes, car security alarms, garage door openers, guitar tuners, camera microphones, telescopes and star pointers, illuminated reticle sights, Christmas lights, tree lights, holiday lights, strings Lamp, LED Flashing Light, Ring Light Remote Control, Pen Light Keychain Flashlight, Torch, Head Light, Neck Light, Bicycle Light, Laser Pointer, Wireless Door and Window Alarm/Door Sensor, Swimming Pool Alarm, Ohm Meter, Diabetes Meter, Blood test machines, blood glucose meters, heart rate monitors, insulin pumps, hearing aids, voice candles, mini robots and mini walkie talkies, life jackets and fluorescent lights and so on.