Feature: 1. 1X measurement voltage is 0~40V, 10X measurement voltage is 40~800V, to adjust to the 1X position, both the probe and the oscilloscope must be set to 1X mode, and to adjust to the 10X position, both the probe and the oscilloscope must be set to 10X mode. 2. If the probe switch is moved to the 10X position and the oscilloscope is in the 1x position, the oscilloscope will not burn, but the measured data is abnormal 3. DSO FNIRSI PRO is a high-performance and cost-effective handheld oscilloscope suitable for maintenance and R&D industries 4. The display is equipped with a 2.4‑inch 320 x 240 resolution high‑definition LCD screen, extremely convenient waveform storage function, built‑in 16MB storage space, can store up to 500 waveform pictures 5. Powerful waving file manager, supports thumbnail browsing, viewing, detailed information viewing, flipping, deleting and other functions 6. The built-in 1200mAh rechargeable lithium battery can be charged continuously for 3 hours at a time. The day mode and night mode can be changed according to your preferences. 7. The oscilloscope has a real-time sampling rate of up to 20MS/s and an analog bandwidth of 5MHz. Specification: Item Type: Digital Oscilloscope Product Material: ABS Product Model: DSO FNIRSI PRO Number of Channels: 1 Screen Size: Approx. 6.1cm / 2.4in Screen Resolution: 320 x 240 Display: LCD screen Analog Bandwidth: 5MHz Maximum Sampling Rate: 20MSps Trigger Mode: Single/normal/auto Waveform Storage: 500 Built-in Battery: Lithium battery 1200mAh Standby Time: 3 hours Charging: 5V/1A/2A/3A/4A. Package List: 1 x Matching Probe1 x Oscilloscope1 x User Manual 1 x Data Line