Description:  TS-990 Portable Handheld Neon Tube Fluorescent LED Tester Universal Lamp Detector Color Discriminator   When the neon lights are not bright、 you can use neon tube test equipment for testing、 so that we can immediately pinpoint the reasons、 timely maintenance、 this will help improve the work efficiency. Neon tube tester is powered by batteries、 so it is easy to use、 simple、 small. It is a good helper of repairing neon.   Specifications:   Material: ABS Size: Approx.19.5 x 4.1 x 2cm Color:Black   Product Weight: 0.097 kg    Product Size (L x W x H) : 19.5 x 4.1 x 2 cm \/ 7.66 x 1.61 x 0.79 inches     Instructions: 1.Install 4 AA-type nickel-cadmium batteries (Please note that the electrode can not be reversed). 2.Please pull out the output head(antenna). 3.Connect the output head(antenna)with the electrodes of the neon tube. 4.Press and hold the button of POWER. In this case、 the LED indicator light and the tested light flash.   Precautions: 1.When the hand touching the head output (antenna)、 you can not press the POWER button to avoid electric shock and danger. 2.Do not use in wet environments or wet hands. 3.If you use conventional batteries、 you must pay attention to battery leakage、 so as not to damage the instrument. 4.When you insert the battery、 you must confirm that the battery polarity is correct、 then you can replace the cover. 5.When you're using、 carrying、 to save time、 you have to avoid strong vibration、 you also need to keep the instrument clean.   Package Includes:   1 x Portable Handheld Neon LED Tester(Batteries are NOT included)  Details pictures: