The Mastech MS5902 is a versatile electrical diagnostic tool. Its automatic circuit breaker finder quickly locates the correct circuit breaker or fuse for a specific outlet, adjusting sensitivity automatically for reliable results. The integrated socket tester verifies the correct wiring of three-prong (grounded) outlets, with three clear indicator lights displaying the socket's status. A built-in flashlight aids visibility in dark electrical panels or low-light conditions, and a low battery warning ensures the tool is always ready for use. Ideal for electricians, DIY enthusiasts, and facility maintenance for tasks like power restoration, safety checks, and project verification in homes, offices, and factories. Specifications: • Brand: MASTECH • Model: MS5902 • Operating Voltage: AC 110V / 220V • Plug Type: US plug or EU plug (optional) • Material: ABS • Color: Black and Green • Receiver Size: 20 x 3.8 x 5 cm (7.9 x 1.5 x 2.0 in) • Socket Tester Size: 6.3 x 7 x 5.5 cm (2.5 x 2.8 x 2.2 in) • Package Weight: Approx. 298 g (10.5 oz) Package Includes: • 1 x Socket Tester with Transmitter • 1 x Circuit Breaker Finder with Receiver