Xos Chest strap X1, Heart Rate Sensor, Bluetooth, ANT +, Wireless, Health, Fitness, smart bike Sensor colour:black 2) Power distribution built-in a

2) Power distribution built-in a 5000mAh26650 rechargeable lithium ion battery

Waterproof: IPX-6

9) Over-charge and over-discharge protection to prevent battery damage or life reduction

Support customization

Xos Chest strap X1, Heart Rate Sensor, Bluetooth, ANT +, Wireless, Health, Fitness, smart bike Sensor colour:black 2) Power distribution built-in a) 1: material: high strength nylon and glass fiber, 2: weight around 33g 3: adaptive pipe diameter 31. 8mm4: adaptive Jiamin, Walker, Magin, IGP Q&A Welcome wholesale and consignment For wholesale, we offer discounts and suggest the best way to get there in a short time. For agent shipping, we can ship the product directly to your customer without leaving any information about us if you wish. What should I do if I don't receive my items? Please