Heart Rate Monitor basic comparison chart
by Sark Products
They all come with a chest transmitter except for the  
Mio Shape + Cardiosport Impulse  No chest strap !

Basic Functions	Cardiosport First	Cardiosport Go (recommended)	Reebok Personal Trainer	Polar F1
Sark Product's Price	$49	$54	$59	$54
Wireless ECG Accurate
Heart Rate display size (inches)	.45	.33	.43	.42
Watch band size range   (inches)	6.0- 8.6	6.0- 8.6	6.0 - 9.0	5.4 - 7.8
One Piece lightweight Chest Belt
Water Resistant
Large LCD Display
Time of Day
Time Alarm
Elapsed Time
LCD Display Night Light
Calculates Average, Minimum & Maximum				Average Only
Changeable Batteries in transmitter
Bike Mount Included	Optional	Optional	Optional	Optional
Sark Product's Price	$49	$54	$74	$54

• Most Durable -----  Reebok Personal trainer
• Chest Straps  -----    Sark Products lets the customer choose transmitter of their choice at no additional cost. We recommend the Cardiosport because you can easily change the battery and it comes with a lifetime warranty. All transmitters are compatible with all watches except, Polar Reebok and Cardiosport transmitters do not work with Acumen watches.  You must have a Polar coded transmitter to work with Polar's S710, S510 Xtrainer and Protrainer XT
• Changing battery in watch should be done by us or someone who can leak test watch.   Simply if the watch is not leak tight corrosion will develop when moisture gets inside.

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MORE COMPARISON CHARTS
Cardiosport New   Cardiosport Older   Acumen   Reebok    
  Polar A Series M Series  Polar S Series
Polar Older fitness   Polar Older Achiever  

 Heartrate  Target Zone   Stop Watch  Weight Loss/ Calorie  
 Memory    Downloading 
  Women   Triathlon   Cycling   Running  Cardiac Rehab
Mio Shape + Cardiosport Impulse  (No Chest Strap)