TS-990 LED Neon Light Tester Multifunctional Tube Detector for T4 T5 Lamps/Leakage Checker/Color Discriminator 【Portable Design】Compact and lightweight handheld neon light tester,easy to carry and use for on-the-go diagnostics. 【Quick Fault Detection】Rapidly identifies the cause of non-functioning naeon lights,saving time and effort in repairs. 【User-Friendly Operation】Simple one-button operation with LED indicator for effortless testing of neon and fluorescent tubes. 【Versatile Functionality】Serves as a multi-functional tube tester and color discriminator for various lighting applications. 【Battery Powered】Operates on 4 x AA batteries (not included) for convenient use without the need for external power sources. Specifications: Material: Primarily ABS plastic Power Source: 4 x AA batteries (not included) Compatibility: Neon tubes,fluorescent tubes Features: LED indicator,extendable antenna Function: Tube testing,color discrimination Usage: Touch antenna to tube's polarity wire,press power button Safety Note: Do not touch antenna while pressing power button Package included: 1 x Neon Light Tester