Maybe one of these similar products would be of interest:-

LCD Display Counter for Rowing Machine with Times and Calories Measurement

Marcy Turbine Rower. Only used a few times and in very good condition

10-Frequency Vibration Plate Exercise Machine,Silent Weight Loss & Fat Burner Vibration Platform Machines with Smart Start-Stop System and 3 Modes,Efficient Shaking Plate for Unisex (Pink+ABS)

Effortlessly Measure Times and Calories with the Rowing Machine Counter

Premium Gym Accessories Measure Times and Burn Calories with LCD Display