The product features a buzzer sound alert with a volume of approximately 100 decibels, along with an indicator light notification. To use: After inserting the test leads, touch the two ends of the wire being tested. If an audible and visual alarm sounds, the wire is conducting; otherwise, it is not conducting. This device contains a built-in 9V battery, and the cover can be opened for battery replacement. When the red and black probes are not in use, the circuit remains open with no current draw. When the measurement circuit is activated, the loop current is approximately 20mA. This product is not intended for testing small electronic components or printed circuit boards. Part name: 9V Buzzer Tester Note: You can test cable continuity, wire integrity, PCB board connections, or general product functionality. Precautions: Do not use when the device under test is powered on or connected to a power source. Color: As shown Material: Plastic Package Contents: 1 x Continuity Tester 1 x Multimeter Test Lead 1 x Red and Black Clip Wire The package includes only the items listed above; other products are not included. Note: Lighting effects and display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.