Polar OH1 optical heart rate sensor tracks heart rate from the arm and makes heart rate tracking easier than ever. It’s a great alternative for heart rate chest straps. It attaches to your arm with a comfortable textile armband and measures heart rate with Polar’s high-quality optical heart rate solution. department_name: unisex-adult, included_components: Polar OH1+;Charging adapter;Getting started guide, , material_type: Nylon

Rechargeable 45 mAh lithium polymer battery. Package height: 12.3 cm. Package width: 9.9 cm. Package length: 5.0 cm. Country of origin:China.

Battery Description: Lithium-Ion Polymer. Sensor Type: Wearable. Item Weight: 77 Grams. Item Dimensions LxWxH: 3.69 x 0.41 x 0.37 inches. Screen Size: 0.96 Inches. Compatible Devices: Smartphones. Color: Black. Material: Nylon. Brand: POLAR. Date First Available: March 12, 2019. Best Sellers Rank: #17,592 in Sports & Outdoors. Customer Reviews: 4.4 out of 5 stars 1,405 ratings 4.4 out of 5 stars. : B07PM5MWVY. Sport Type: ?Wireless. Size: ?Medium/XX-Large. Included Components: ?Charging adapter, Getting started guide, Polar OH1+. Model Year: ?2019. Part Number: ?82074855. Manufacturer: ?Polar. Suggested Users: ?Unisex-adult. Material: ?Nylon. Color: ?Black. Model Name: ?Polar OH1+ HR Sensor. Warranty Description: ?Yes. Brand Name: ?POLAR. Item Weight: ?77 Grams. Item Dimensions LxWxH: ?3.69 x 0.41 x 0.37 inches. Package Weight: ?0.08 Kilograms. Item Package Dimensions L x W x H: ?4.65 x 3.66 x 1.89 inches.