Portable handheld neon tube. Easy to use just by pressing and holding POWER button, then LED indicator and the neon tube will flash. Let the user know the neon tube's situation rapidly. Powered by batteries, easy to use and carry. It is a great tool for repairing neon lamp. Feature - Color: As Shown. - Material: ABS+Electronic Components. - Size: 19.5 x 4.1 x 2cm. - Powered by 4 * AA batteries (not included). - With this tester, you can quickly find the reason why neon lamp does not turn on. - How to use: Install the batteries (pay attention to the polarity). Extend the antenna and to the polarity wire of neon tube. Press and hold POWER button, then LED indicator and the neon tube will flash. - When you touch the antenna with your hand, DO NOT press POWER button, or you will be shocked. - DO NOT use this item in a damp environment or with wet hands. - DO NOT reverse the polarity of the battery. Please install the batteries correctly before closing the cover. - Avoid strong vibration while using, carrying, or storing. Keep this item clean. Package List: 1* Neon tube tester. Package list: 5 x Tester