1. The product is compact and can be operated with one hand, making it easy to hold for a long time without feeling tired. 2. Equipped with component judgment light, the green light will turn on when the components are normal. 3. Integrated model intelligent component testing tool, different components do not need to shift gears, one-step recognition, intelligent recognition results in seconds, efficient, fast, accurate, and stable. 4. Use copper component test ports to avoid frequent insertion and extraction, accelerate damage, and effectively test circuits. 5. Get rid of the wired system, type-c port can be used for both charging and plugging, without the need for an external power supply, with long battery life, low power consumption, and long-lasting durability,Specifications: rechargeable version (built-in polymer lithium-ion battery)(Ships without type-c charging cable). Widely applicable for testing various electronic components, supporting testing of optocouplers, igbts, thyristors, npn transistors, nmos transistors, pnp transistors, pmos transistors, 431, etc. Colour:Black Material:ABS Package Contents: 2 * Optocoupler Test Detection Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.