Features: Quickly test LED bulbs (B22/E14/E27) for voltages and power compliance with alerts for defective units, ensuring safe electrical testing and instantly quality checks. Plastic construction houses quick swapping sockets and a toggle button for seamless switching between voltages and power detection modes. Essential for electricians, quality inspectors, and lighting manufacturers requiring precise electrical measurement tools for production line diagnostics. Streamlines workshop efficiency by testing unfinished/finished fixtures in manufacturing facilities or repair stations with instantly alternating current load analysis. Professional LED tester combines rapid plugs and play operations with auto alarm functionality, eliminating guesswork in voltages measurement and power validations workflows. Specifications: Component: Plastic Plug: US voltages: AC0-300Volt, measurement accuracy 0.5% Power: 0-400W, measurement accuracy 0.5% Buzzer: Make a sound: Product pass; Make more sound: Product is not qualified Package Includes: 1Piece Led Tester 1Pair Test Wire 2Pcs Fuses note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.