High Quality NEW!!! Dimensions: 59 x 35 x 13.5 mm Weight: 15 g Strap Adjustable: (L) 65-95 cm Heart Rate Range: 30-240 bmp Wireless Transmission: Bluetooth 4.0 & ANT+ Transmission Distance: Bluetooth; 10m/ANT+; 6m Battery: Lithium Battery Life: 300 hrs Waterproof: IP67 1 CR2 batteries required (INCLUDED) Can last up to 12 months! ACCURATE HEART RATE MONITOR - Helps you track & capture accurate heart rate reading & other workout data across your training apps. POWERFUL CONNECTIVITY - Supports both BLUETOOTH & ANT+ simultaneous connection. You are able to connect to more devices at once! THE MOST APPS & DEVICES - Allows you to connect to the widest array of fitness devices, such as smart phones, smart watches, tablet & laptops, bike computers, GPS, etc. & the most popular training apps - Peloton,Zwift, DDP Yoga, Map My Ride, Endomondo, etc. HIGHLIGHT DESIGN - Green LED lights & beeps tone which helps to verify that your heart rate sensor is connected to a device & capturing heart rate data. How to Use - Moisten the plastic electrode areas on the reverse side of the strap, check that the moist electrode areas are firmly against your skin & that the connector is in a correct position. Make sure you go to the APP to add HR sensor.