This handheld continuity tester is a simple, reliable tool for checking whether wires and other conductors are continuous. It combines audible and visual alarms with extremely low standby power consumption for long battery life and straightforward operation. Key benefits Quickly identifies conductive vs. broken circuits with sound and light signals, saving diagnostic time. Very low standby current: probes act as the switch, so the circuit is off when not measuring. A single 9V battery can last approximately 3–5 years under normal use. Simple, intuitive operation requires no setup — useful for electricians, technicians, hobbyists, and DIYers. Main features Function: continuity test (audible and visual alarm) for wires and other conductors; equivalent to a continuity function on a multimeter. Power: uses one 9V battery (replaceable). Battery compartment accessible via back cover. Probes: red and black meter probes function as the test switch; touching probes to the two ends of a conductor completes the circuit and triggers alarm if conductive. Performance: no current draw when probes are not contacting a circuit; long battery life (estimated 3–5 years). Simplicity: compact, no complicated settings — designed for fast, repeatable checks. How to use Pre-check: short the red and black probes together before testing. A proper sound and light alarm indicates the tester and battery are working. If there is no alarm, check the probes and the battery. Testing: touch the red and black probes to the two ends of the wire or conductor you are testing. If the device emits the sound and light alarm, the conductor is continuous. If there is no alarm, the circuit is open or the conductor is broken. Battery replacement: open the back cover to replace the 9V battery when needed. Compatibility and typical applications Compatible with wires and most metallic conductors used in electrical, automotive, and electronic systems. Use scenarios: Inspecting household wiring or cable runs to locate breaks or verify continuity. Checking automotive wiring harnesses and connectors during repairs or diagnostics. Verifying continuity on cable assemblies, patch cords, or simple PCB traces during prototyping or maintenance. Quick troubleshooting If the tester does not respond when probes are shorted, check: Probe condition and connections. 9V battery charge and seating; replace battery if necessary. This continuity tester provides a straightforward, low-power method to confirm conductive paths, making routine checks fast and dependable without complex configuration.