The Oregon Scientific WM100 wireless heart rate logger connects to any 5.3 kHz heart rate monitoring chest strap. There are many 5.3 kHz Heart Rate Monitors in the market, but only a very few can record and track workout data. The SmartSync Data Logger records the user?s heart rate, downloads the workout data to a PC through the included USB cable, and can then analyze workout performance with the included PC software. The slim recorder can be clipped to the waist and activated with the touch of a single button. Compatible with any 5.3 kHz Analog, Polar and IDT Coded heart rate signal, the Data Logger can store up to 30-hours of workout data. Features: No wires to interfere with your workout Keep organized with the included software Compatible with most heart rate monitors Turn On/Off Data Logger Memory Battery Indication Factory mode LED Light Indication PC Software (USB Connection) User Manual.