This is a brand new Hanna Instrument PH Growchek HI991401. I bought this with the intentions of growing hydroponic vegetables but ended up going another direction with water management. I only used this product to zero it in.
Usage: RFD-D ultrasonic fetal doppler meets the fetus daily check and routine examination at home, clinic, community and hospital. Features for fetal doppler: ? Easy and convenient&
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