Product information:
Power type: dry battery
Specification: Color box size : 19.3*9.7 * 6.6CM
Material: ABS
Style: Pink (English Foreign Trade version, without battery),Gray (English version, without battery)
PH Value : 5.5-8
Viscosity : >15Pa.S
Battery : AA battery
Display Screen : 35 x 34mm LED light
Speaker : 32mm 8R 2W
Power supply : DC 3.0V(AA battery x2)
Ultrasonic operating frequency :2.5MHz
Overall sensitivity : >90dB
Measure range : 65-210 BPM
Speed of sound : 1520-1620m/s
Acoustic lmpedance : 1.5-1.7x 106Pa.s/m
Acoustic Attenuation : <0.05Db