Item name:Heart Rate Sensor Unit size :57.6*33*11mm Wireless connection : Bluetooth /ANT+ Chest strap size : 64-86cm (±2cm) Battery model : CR2032*1 Water proof level : IP67 Anti-splash Heart rate unit : bpm Heart rate range ：30-240bpm Heart rate accuracy ： ±1bpm Weight Sensor : 13g; Chest strap: 30±1g Battery life ： 1000 h Content in box ： Sensor*1, Chest Strap*1, CR2032 battery* 1 (installed) 🔥Pre order 5 to 7 working days Deliver to Malaysia, SG, Brunei, Worldwide Accept Ewallet Boost TouchnGo Etc.. & Credit card How to Order 1.Product Option: 2.Quantity: 3.Color: 4.Name: 5.Address: 6.Contact number: Send to ☎FB http://m.me/icebikeheaven ☎ http://www.wasap.my/60174204398 Sales, Order, Customer service ☎ http://www.wasap.my/60195272398 After sales/ Warranty FOLLOW US ✔ https://www.ebay.com/str/icebikeheaven37 ✔ https://shopee.com.my/icebikeheaven?tab=shop ✔ http://www.lazada.com.my/ice-bike-heaven/ ✔ https://fb.me/icebikeheaven ✔ https://www.instagram.com/icebikeheaven37/ Buy from Us! 🚴🏻💯% POSITIVE FEEDBACK 🚴🏻💯% Warranty & After Sale Service 🚴🏻💯% PARCEL ARRIVAL GUARANTEED 🚴🏻💯% ❌hidden charges 🚴🏻 7️⃣ days size exchange 🆗 🚴🏻 7️⃣ days 100% 💲💲 Guarantee back ☄ Prompt response 🥇♞ SSM Registered company- Icebikeheaven 🥇 7 Years of experience