The Reebok Hybrid is a versatile heart rate monitor that can be used either with or without the chest strap to accommodate a wider variety of people and be suitable for a wide array of different exercises and workout styles. The Reebok Hybrid has a long list of cutting edge features including; calorie and fat burning readings, hi and low target zone alarms, recovery timer, average and maximum heart rate readings and more. The Reebok hybrid is the perfect tool to take your workout to another level and get better results faster.