Thank you for viewing. This is the Polar Verity Sense, an optical heart rate sensor with Bluetooth connectivity. I've used it a few times, but the main unit has no noticeable scratches or stains. The contents are all present, but please note that the box and inner bag have been opened and may have some dirt. - Brand: POLAR - Model Name: Verity Sense - Type: Optical Heart Rate Sensor - Connectivity: Bluetooth