1. This product is a multifunctional tester with built-in high-precision voltmeter + resistance measuring instrument + diode tester + oscilloscope. 2. Pen design, easy to use, easy to carry 3. This product can be mainly used in some quick maintenance scenarios 1. Oscilloscope: Frequency measure Accuracy:+/-1% Max One-key AUTO display waveform Sampling Rate:2MSa/s 400KHz Bandwidth Storage depth:4Kbit Trigger mode:Auto Trigger edge:Falling edge Coupling mode:DC Maximum test voltage:24V Vertical sensitivity:50 mV/-10 V/ Horizontal time base range:10us/-200ms/ 2. Voltage measure: Measure Accuracy:+/-1.5% or +/-0.15V Max Maximum Input - Voltage:24V Minimum Resolution:0.1V Voltage Alarm 3. Resistance measure Measure range:10Q-5M Measure Accuracy:+/-2% 4. Diode measure 5. On-Off measure 6. Other paremeters: 1.14inch 135x240 TFT Rechargeable Battery Product Size:160x27x26mm Power port:USB Type-C 5V/1A Operate humidity:less than equal 80% Operate temperature:0-50 Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Material:ABS Package Contents: 1 x Multifunctional tester 1 x Test attachment 1 x charging cable 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.