Features for Fingertip Pulse Oximeter: <br />- Ergonomic design、 special for children<br />- Comfortable for wearing<br />- Measure SpO2 and PR accurately<br />- OLED display SpO2 and PR、 Pulse waveform and bargraph display<br />- Alarm function: Detected data going beyond limit alarm (when the SpO2 is below 90%、or the pulse rate is not between 50bpm and 120bpm、 the alarm occurs); Low power alarm<br />- Rechargeable button lithium battery<br />- High brightness can be used even in dark night <br />- Four viewing angles and six display modes <br />- Four levels adjustable brightness <br />- Low battery voltage indicator <br />- Automatic power off when signal is not available for 4 seconds <br />- Mini size、 light weight、 convenient to carry <br />Specification for Fingertip Pulse Oximeter: <br />Display <br />OLED two color<br />SpO2 <br />Measurement range: 35∥99%<br />Resolution: ÷1%Accuracy: ÷2% (70%∥99%)、 unspecified (<70%) <br />Pulse rate <br /> <br /><br />Measurement range: 30∥255 bpm<br />Resolution: ÷1%<br />Accuracy: ÷2bpm or ÷2% (select larger) <br />Power<br /> <br /><br />1.5V (AAA size) <br />alkaline battery x 2<br />Supply voltage: 2.6~3.6V <br />Working current <br />●30mA <br />Interference resistance against ambient light <br />Deviation between SpO2 in nature indoor lighting condition and in dark room is less than ÷1% <br /><br /><br />Package Content: <br />- 1 x RPO-50QB Fingertip Oximeter <br />- 1 x Lanyard<br />- 1 x English user's manual<br />- 1 x Pouch