1. The product is made of high-quality materials with guaranteed quality 2. The product is very suitable for DIY electronics enthusiasts, school training, experimental development, etc 3. Stable product performance and long service life 4. This is a multifunctional instrument production kit that measures voltage and current, temperature, logic level, circuit on/off, signal frequency and duty cycle, signal output, etc 5. Short press SW2 to switch the function, with Nixie tube display, the data is clear at a glance Product Name: Multifunctional Instrument Production Kit Power supply : USB power supply 5V Working voltage: 5V Working current: Static less than 30mA Measure voltage and current Measure logic level, high level, low level, High impedance Measuring circuit on/off Measurement frequency and duty cycle Signal generator with adjustable frequency and duty cycle Measure the current ambient temperature External temperature sensor can measure external temperature Two power outputs of 3.3v and 5v Installation tutorial: https://.bilibili.com/video/BV1tN411S7wz/? Copy to browser to watch video tutorial Colour:Photo Color Material:plastic Package Contents: 1 x DIY loose parts with shell Note: Parts need to be welded by yourself 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.