WISTERIA LANE Handheld Heart Rate Detector Sonar Heartbeat Monitor For Homeuse

Specification: Size: 138mmx96mmx32mm Weight: 150±20g (with battery) Working environment: Temperature: 5 ℃ ~ 40 ℃ Humidity: ≤80% Atmospheric pressure: 86KPa ~ 106KPa Storage and Transportation Temperature: -10 ℃ ~ 55 ℃ Humidity: ＜93% RH Atmospheric pressure: 86KPa ~ 106KPa Display Screen 35mmx28mm Power: DC 3V (2 x AA) alkaline batteries General Sensitivity At a distance of 200mm from the probe surface, the general sensitivity is 91 dB Display range heart rate measurement shows the range of 50-210bpm. In the range of 50-210 bpm, the error is ± 2bpm (digital display) Ultrasonic output power Skin irritation: None Sound speed 1520-1620m / s Acoustic impedance 1.5-1.7x106Pa.s / m Acoustic attenuation Viscosity > 15Pa.s PH valu:e 5.5-8 Working frequency: 2.5MHz±15% Peak negative pressure P- 20.0KPa Spatial peak time average derived sound intensity Ispat 7.00mW / cm2 Packing list: The main unit -------------------------1pc transducer ---------------1pc User manual --------------------------1pc

High sensitivity3 Display mode on backlit LCD displayBuilt-in clear speaker with volume control and earphone port available for listening quietlySimple design for easy to use at home.