RSD7700 Handheld Pulse Oximeter Details： Features 1. Two parameters:SPO2, and Pulse Rate 2. Spo2 waveform(PLETH),PR strength display 3. 2.8 inch color TFT LCD in real time display, displayable in big font and big screen 4. Long time monitoring and sleeping monitoring 5. Audio and visual alarm when parameters exceeded and sensor-off 6. Built-in rechargeable Li-ion battery, up to 15-hour running time 7. Battery capacity indicator. Automatic shutdown for power saving   Standard accessories one Adult finger SpO2 sensor one AC charger   Technical Specifications 1. General Monitoring Parameters: SpO2、PR、PLETH、Pulse strength Signal sockets：SpO2 socket、PR socket、USB socket(for AC power) 2. Display screen             Type: 240 × 320 dot matrix color TFT LCD screen Display area: 43mm×58mm 3. Functions PLETH: The oximeter can display PLETH waveform Audio and visual alarm: The speaker sounds the alarm and the parameter’s measurement will become in red to flash on the screen. Also the same when sensor-off. Prompting: Icons of battery capacity, pulse sound switch and alarm sound switch. Power saving: The oximeter will automatic shut down to save power. The time is settable. 4. Power Requirements AC power adaptor      Input: AC 100 V～240V, 50/60Hz, 5VA Output: D.C. 5V Internal battery  Type: D.C. 3.7V/3000mAH Li-ion rechargeable battery Run Time: 15-hour continuous operation with a new, fully charged battery (environment temperature is 25℃) Recharge time: 8 hours 5. Environment Temperature Operation: 0°C ~ 45 °C    Transportation and storage: -20°C ~ 60 °C Humidity Operation: 15% - 95 %( noncondensing)   Transportation and storage: 10% - 95 % (noncondensing)   Altitude Operation: 86 KPa ~106 KPa Transportation and storage: 50KPa~106 KPa 6. Parameter Specifications SpO2 Patient: Adult, pediatric,neonate Range: 0% - 100% Resolution: 1 % Accuracy: 70% - 99%: ±2 % 0% - 69%: Unspecified PR Range: 0 bpm ~250bpm Resolution: 1bpm Accuracy: 2bpm