Product information: Product Category: Fetal Heart Stage: second trimester Specifications: LCD LCD digital single display, TFT color digital ripple dual display Feature: -Ergonomic design, compact and lightweight -Low power check of battery -Battery status indicator -Easy to use, the probe can be replaced. -Built-in speaker with volume control -Headphone jack or export audio signal to computer or other audio equipment -Accurate fetal heart rate detection, clear sound -High sensitivity interchangeable probe -Support 3MHZ probe -Long-term continuous use (two AA alkaline batteries can be used for 10 hours) - Automatic shut-down Safety: Comply with: IEC 60601-1:1988+A1:1991+A2:1995 Packing list: Twins*1 Product Image：