brand new and high quality Features: Portable handheld neon tube tester. Easy to use just by pressing and holding POWER button, then LED indicator and the neon tube will flash. Powered by 4 x AA batteries (not included). With this tester, you can quickly find the reason for why neon lamp does not turn on. How to use: Install the batteries (pay attention to the polarity). Extend the antenna and for touch it to the polarity wire of neon tube. Press and hold POWER button, then LED indicator and the neon tube will flash. Notes: 1. When you for touch the antenna with your hand, DO NOT press POWER button, or you will be shocked. 2. DO NOT use this item in a damp environment or with wet hands. 3. DO NOT reverse the polarity of the battery. Please install the batteries correctly before closing the cover. 4. Avoid strong vibration while using, carrying, or storing. Keep this item clean. Specification: Powered by: 4 x AA batteries (not included) Body material: ABS Length: 19cm/7.48inch Color: Black Quantity: 1 Pc Package includes: 1 x Neon Tube Tester