8 Pack Heart Rate Monitor Bracelet Adjustable 11.8 Tsolay size: 20 mm x 300 mm Package content: 8 x wristbands Only the above -mentioned package content, other products are not included. Note: Due to the light reflection and screens, the colored tone in the photos and the actual product could be a little different.The permitted measurement error is - 1-3 cm. Ingredients ingredients Polyester material: polyester.Good compatibility: Our replacement belt for heart rate knives is practical, light and compact and compatible with most heart rate sensors.You can choose a suitable length based on the hole that does not move on your arm, but is not so tight that it prepares you discomfort.Widdled outdoors and inside: the replacement tape for the heart rate knife can either be worn on the wrist or on the arm and is suitable for many activities such as climbing, cycling, jogging, yoga and mountaineering.Color: black green blue orange.Adaptable so that it suits you well: the fitness monitor band is flexible and adjustable, you can adapt the length so that it fits your arm well, perfect for most women, men and girls.