Product description: 1. 8 Channels input, 2. Logical light indication: a small light indicate cho electrical level, 3. Input feature: 5pf, 100k ohm, 4. Usb power supply, 5. Sampling rate can be seted as below: 24mhz. 16Mhz, 12mhz, 8mhz, 4mhz, 2mhz, 1mhz, 500khz, 250khz, 200khz, 100khz, 50khz, 25khz, 6. Data upload real time, the max of depth of collection is 10t, far from practical need.