The Suunto Smart Heart Rate Belt has an R-R memory that is used when the watch is not within reach of the Bluetooth smart radio. This is great for example in team sports where it allows recording without wearing the watch. The memory function is supported with all Bluetooth Smart enabled watches except Suunto Run, Suunto 7 and Suunto Kailash.Biking, team sports, martial arts, climbing, swimming, water sports, triathlon, ski mountaineering, cross country skiing, skating and gym enthusiasts will see the greatest benefits from using the Suunto Smart Heart Rate Belt

• Comfortable fit, low weight, small size
• Multiple sports including winter sports, biking, swimming, and team sports​
• Compatible with Bluetooth smart devices / BLE devices​
• Heart rate measurement: Yes
• Heart rate variability measurement: Yes
• Battery life: 500 h
• Easy battery change: Yes
• Battery: CR2025
• Removable transmitter module: Yes
• Replaceable chest strap: Yes
• Weight with M size belt: 40,6 g
• Smart module size: 36,5 x 36,5 x 8 mm
• Chest strap sizing range: S: 56-82 cm, M: 70-110 cm, L: 96-160 cm
• Water resistance: 30 m (ok for swimming)
• Module material: Fiber reinforced composite material
• Strap material: Polyamide/elastane with polyurethane contact surfaces
• Radio compatibility: Bluetooth Smart (Bluetooth Low Energy)
• Internal memory: Stores and forwards 3,5 h of measurement data at 120 bpm when used with compatible Suunto watch
• Temperature range: -20…+60°C
• Movesense apparel compatible: Yes
• Washing instruction: Rinse after each use, machine wash the chest strap without the smart module in 30°C after 2-3 uses. Do not use any fabric softener.