产品描述
Features:
● Easy to use
● Built-in speaker
● Waterproof Interchangeable probe
● Lower battery energy indication
● Built-in rechargeable batteries
● Sound alarm function when FHR is out of the normal range
● Two LED display real-time FHR and average FHR
规格：
● 超声频率：2.5MHz
● LCD Size: 38mm*17mm
● Dimension: 185mm(W)*183mm(D)*132mm(H)
● Weight: 870g
● Continuous work time: ≥8 hours
