HOW TO USE 1. Open battery cover and insert two(2) AA batteries (with(+) side pointed towards tip). The wand shortly sounds two in case battery correctly installed. 2. Remove the red protective cap turning on unit. Cap must be off for sensor to work properly. 3. Press and hold the white power button for two seconds tostart a 25second self-inspection, 4 light will blink in sequence. The detector is for use after beep sounds and LED,,lights turn off and LEDlights on in green color. 4. Place the sensor tip of the wand along the connection point that you are testing. Be cap is off. If checking leaks on a pipe, be to move the sensor slowly along the pipe over joints&ittings. Caution must be taken when utilizing the wand outdoors or in the presence of winds or air flow. Wind direction, strength, leak size and dilution of detectable gases may interfere with proper readings or mask a potentially dangerous leak. Material: ABS Color: as shown Package Contents: 1 x Analyzer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.