I opened the item for a test run and used it once for a fitting. The box has a slight damage from the time of purchase. I am selling this because I ended up using a chest sensor and didn't use this. I deleted the listing once because I was receiving frequent requests for price reductions. The item is as good as new, so I am not considering a price reduction. COROS heart rate monitor, capable of measuring accurate heart rate. - Brand: COROS - Product Name: COROS HEART RATE MONITOR - Model Number: SP-101A368 - Condition: New Thank you for viewing.