Item Type: Light Tube Tester Material: ABS Weight: Approx. 83g / 2.9oz Product Size: Approx. 20x4x2.1cm / 7.9x1.6x0.8in Retractable Antenna: Approx. 15cm / 5.9in Battery Parameters: 4 x AA Batteries (Battery Not Included) Function: Used for neon tube detection Application: Light-fixture pavilion, hardware store, electrician, home inspection, shipment inspection, etc. How to Use: Install 4 AA batteries (not included), pull out the output head (antenna), touch the output head (antenna) with the electrode line of the neon tube, press and hold the POWER button, at this time, the LED indicator and lamp under test flashes. Package List 1 x Light Tube Tester (Battery Not Included) 1 x English Manual 1.Please allow 0& 8209;1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3.When touching the output head (antenna) with human hands, do not press the POWER button to avoid electric shock and danger.4.It is strictly prohibited to use it in a humid environment or when the hands are wet. 1Neon light tester, which lights up when touched, suitable for the detection of various neon light tubes. 2Adopt dry battery (not included) to supply power, low power consumption, it is a practical tool to repair neon lights. 3Just press and hold the power button and the LED indicator and neon light will flash. 4Suitable for lightfixture pavilion, hardware stores, electricians, home inspections, shipment inspections, etc. 5Portable neon tube detector, small and light, can quickly find the reason why the neon light is not on.