Name: BV-520T – Audio & Digital Display Function: To detect the blood stream status of arterial/venous by 8MHz probe, detect the blood flow average velocity; detect the purpose of finger/toes and part of body’s vein anatomies operation. Technology : In/out power: D.C 9V 1000mA Batteries: 7.4V 900mA Doppler Frequency: 100~7000Hz Atmospheric Pressure: 86~106Kpa LCD: 128 x 96 dots Display: blood stream average velocity, PK, time, volume and battery Working Temperature: 10-40°C Humidity ≤80% Unit Weight: 300 grams Dimensions: 35 x 55 x 13mm