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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
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