The infrared singnal can't be seen with our eye. but with digital camera, it can be seen.
So, if you want to know whether an infra red remote control (TV, air conditioning, etc.) the function is Ok or not, or want to know the battery is still good or weak, take your digital camera, you can also using hand phone camera.
1. Turn on the digital camera and switch to camera position function.
2. Press and hold one of buttons of the remote control
3. Use the camera to see infrared light of the remote control.
4.Look at the camera monitor, if the remote control is in good condition, then the light from the infrared remote control will be seen on the camera screen brightly.
