Note: DC + 3.3V is used in R558S power supply design. Power input is not allowed until the R558S is connected. Do not plug or unplug the cable while powered (hot plugging is prohibited). Ensure power is disconnected during cable connection or disconnection. Unstable power connection, insufficient power-off/power-on intervals, or excessive voltage drop pulses may prevent the R558S from operating stably and normally. Maintain stable power input. After turning off the power input, wait at least 2 seconds before reapplying power. Specifications: Image pixels: 112 × 88 Resolution: 508 dpi Sensor wear resistance: >200,000 cycles Storage capacity: 100 fingerprints Matching modes: 1:1 and 1:N Self-learning capability: Yes LED indicators: Colorful lights Fingerprint image capture time: <180 ms Algorithm search time: <100 ms (at 50 fps) Overall recognition time: <0.6 s (for 50 templates) Startup time: <50 ms False Acceptance Rate (FAR): <0.001% False Rejection Rate (FRR): <1% Communication interface: UART (3.3V logic level) UART default baud rate: 57600 Supply voltage: 3.3 ± 0.3 V Maximum operating current: <40 mA (VDD) Shutdown current: <12 µA (VDD) Operating temperature: -30°C to +70°C Storage temperature: -40°C to +85°C Relative humidity: 20%–85% (non-condensing) ESD protection: Contact discharge ±8 kV; Air discharge ±15 kV Vibration resistance: 10–150 Hz, 0.5G, 3 axes, 1 min/octave, 1 cycle per axis Drop resistance: Withstands 1.2-meter drop onto concrete IP rating: IP54 (front panel) Color: Photo Color Material: Plastic Package Includes: 1 × Fingerprint Module 1 × Cable