Features: [Quality Material] Made of high quality materials, durable to use. [One Machine for Multiple Purposes] Dual control switch, testing voltage+current+ power+power factor, suitable for testing semi-finished or finished lamps(B22, E14, E27 type lamp, AC load, cable clamp). [High Precision Test] The error range is within 0.2%. [Seesaw Switch] Capable of turning off the live line and zero line at the same time, and the built-in indicator light makes the operation much safer. [Plug-in Interface] The plug-in type interface of the lamp holder makes testing more convenient and efficient, so you just need to simply plug your LED lamp into the correct hole and push the switch to test. [Dual Clamp] Capable of being connected to lamps without lamp cap, such as ceiling lamps / downlights / spotlights / floodlight / ventilating fans, etc. [Short Circuit Overload Protection] Equipped with fuse, it can protect the tester and lamps from burning and damage when the lamp is suddenly short circuited. [Alarm Function] The tester will automatically alarm when the defective lamps do not meet the standard range. [Wide Application] Applicable to drive power test, lamp bead test, lamp board test, etc.. Suitable for high voltage.