Suunto Smart Heart Rate Belt 2

Designed for performance-driven endurance athletes, marathon runners, triathletes, and cyclists who demand absolute data accuracy. Constructed with a premium stainless steel and polymer composite housing, the SUUNTO Smart Heart Rate Belt 2 (SHRM2) captures clear ECG signals directly from the chest. Whether pushing through high-intensity intervals, racing on the road, or cycling over rough terrain, it delivers lag-free, rock-solid accuracy far superior to wrist-based optical sensors.

High-Resolution R-Peak Detection & ZoneSense™ Optimization
Featuring an upgraded 2nd-generation sensor array with higher resolution R-peak detection, the SHRM2 captures subtle beat-to-beat intervals (HRV). This precise data feeds directly into SUUNTO's proprietary ZoneSense™ algorithm, offering real-time insights into your aerobic, threshold, and VO₂max stress zones during workouts.

Torso-Based Running Form Dynamics
Eliminate the need for additional foot pods or waist sensors! When paired with compatible Suunto performance watches (such as Suunto Race, Vertical, and Run series), the belt provides comprehensive running biomechanics:  

• Ground Contact Time (ms) 
• Vertical Oscillation (cm)  
• Flight Time (ms)  
• Left/Right Balance (%)  
• Cadence (rpm) & Step Count

Swimming Memory & Offline Storage
During swim workouts or periods of temporary signal loss, the sensor automatically records heart rate data to its onboard memory. Once back on land or reconnected, stored data seamlessly transfers to your Suunto watch, giving you a complete ZoneSense™ and heart rate graph from the water.  

Multi-Device Connectivity & Zwift Integration
Equipped with Bluetooth 5.4, the SHRM2 supports up to 3 simultaneous Bluetooth Low Energy (BLE) connections. Broadcast your heart rate concurrently to your Suunto watch, bike computer, and virtual indoor training software like Zwift or gym equipment without signal drops.

Button-Controlled Security & LED Status Light
Stay in control with a new built-in LED status light that alerts you to battery levels and connection states. Secure, button-controlled pairing and encrypted transmission prevent cross-talk and signal interference in crowded start lines.  

Ergonomic Anti-Slip Design & 30m Water Resistance
The soft, washable fabric chest strap features a silicone anti-slip grip to keep the belt securely in place during vigorous efforts. Enhanced signal shielding prevents static electrical noise caused by dry performance fabrics. Rated 30m (3ATM) water resistant for all weather and aquatic conditions.

Chest strap sizing range: M/L$:\; 74-125\text{cm}$