Here is the feature summery of different sonotrax models
Model | Interchangeable /water prove Probe | display | displayed content, FHR=fetal heart rate, Mhz=frequency of probe | Low noise technology | Built-in Audio Recorder | battery |
Sonotrax Lite | Yes | No | n/a | No | No | 2 x AA |
Sonotrax Basic | Yes | monochrome display | FHR, Mhz, battery low | No | No | 2 x AA |
Sonotrax Basic A | Yes | monochrome display w/backlight | FHR, Mhz, battery low | No | No | 2 x AA |
SonotraxPro | Yes | monochrome display w/backlight | FHR, Mhz, battery low | No | Yes | 2 x AA |
Sonotrax II | Yes | monochrome display w/backlight | FHR, Mhz, battery low | No | No | NiHm rechargeable with charger |
Sonotrax Pro II | Yes | monochrome display w/backlight | FHR, Mhz, battery low | No | Yes | NiHm rechargeable with charger |
Sonotrax Vascular | Yes | No | n/a | No | No | 2 x AA |
SD3 lite | Yes | no | n/a | yes | No | 3 X AAA |
Sd3 Basic | Yes | color OLED | FHR (2,3mhz probe) or Mhz( 2,3,4.5,8mhz probe) , battery low | yes | No | 3 X AAA |
Sd3 Plus | Yes | color OLED | FHR (2,3mhz probe) or Mhz( 2,3,4.5,8mhz probe) , battery low | yes | No | LI-ION rechargeable with charger |
Sd pro | Yes | color OLED | FHR (2,3mhz probe) or Mhz( 2,3,4.5,8mhz probe) , battery low | yes | yes | LI-ION rechargeable with charger |
Sd3 Vascular | Yes | no | n/a | yes | No | 3 X AAA |