If you are fascinated by the world of electronics, the FNIRSI S1 will be your reliable ally in everyday DIY. This advanced digital multimeter with inverted, clear VA HD display is not just an everyday tool, but a reliable companion ready for any challenge. From the repair of printed circuit boards, household appliances, computers, cars and mechanical devices to the tasks of an electrician or mechanic, the FNIRSI S1 meets the needs of even the most demanding users.
The FNIRSI S1 multimeter supports AC/DC voltage measurement, continuity test with sound signal, impressive battery capacity, resistance, Hz frequency, NCV voltage test, built-in diodes, phase and neutral wire inspection, temperature reading, as well as automatic identification, burnout protection, automatic shutdown, data retention (data recording) and True RMS measurement functions. It is also equipped with a flashlight and intelligent minimum deviation measurement function - vital for irregular current waveforms.
Thanks to the built-in computer chip, the FNIRSI S1 works quickly, accurately and safely. The Smart Anti-Burn function with full protection against overload and burnout eliminates the risk of damage to the device due to malfunction. The automatic range change and the HOLD function allow you to concentrate on the work without disturbing the measuring probes.
The device is powered by a built-in 1000 mAh lithium battery, which can be charged via a USB-C connector. No need to replace button or AAA batteries anymore - it's both convenient and environmentally friendly.
The FNIRSI S1 multimeter offers NCV voltage detection with light and sound, so you can quickly identify a live wire. The device with dual functions as a multimeter and electrical test pen (Zero/Live Wire Check) will be perfect for both home and professional workplaces.

- Model S1
- Diodes Built-in
- Auto power off Supported
- Flashlight Supported
- NCV induced voltage Supported
- Live Mode Supported
- Data retention Supported
- Analog Supported
- Low voltage indication Supported
- Maximum range 9999
- Valid value 50Hz 1kHz
- Material ABS
- Display VA color screen
- Weight 135 g
- Power supply Rechargeable lithium battery with a capacity of 1000 mAh
- Size 143 x 75 x 19 mm
- Security level III. level 1000 V