Train with greater precision and understand your effort in real time with the Suunto Smart Heart Rate Belt 2. Designed for athletes who demand reliable data across every session, it captures accurate heart-rate and beat-to-beat data directly from the chest — providing deeper insight into training intensity, recovery and performance.
With ZoneSense, beat-to-beat data helps distinguish between aerobic, anaerobic and VOâ‚‚max intensity in real time, giving you a clearer picture of how your body responds as effort changes.
Built for serious training, the belt delivers reliable heart-rate data during intervals, racing and changing intensities, while built-in memory allows it to record heart-rate data during swimming when a live Bluetooth connection isn’t available. Once back in range, stored data transfers to a compatible Suunto watch.
The soft, washable strap with silicone grip stays securely in place during long and demanding workouts, while improved signal protection helps maintain reliable measurement even when clothing shifts.
The Smart Heart Rate Belt 2 connects with Suunto watches, Bluetooth Low Energy devices, Suunto App and Sports Tracker App, giving you the flexibility to train across multiple platforms and devices.
| 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. |
|---|
| Specification | SHRM 2 |
|---|---|
| Overview | |
| Product Name / Model | SUUNTO Smart Heart Rate Belt 2 (SHRM 2) |
| Fit | Comfortable fit, low weight, small size |
| Sports Compatibility | Multiple sports including winter sports, biking, swimming, and team sports |
| Device Compatibility | Compatible with Bluetooth smart devices / BLE devices |
| Measurements | |
| Heart Rate Measurement | ▲ Yes |
| Heart Rate Variability Measurement | ▲ Yes |
| Memory Function | Yes for the Heart rate variability and heart rate. The memory is only compatible with Suunto Watches. The memory is 20 hours long with a heart rate of 180 BPM. |
| Running Form Measurement | ▲ Yes |
| Connectivity | |
| Bluetooth Pairing | User controlled acceptance of who can connect. Connection is encrypted. |
| Supported Concurrent Bluetooth Connections | 3 |
| Bluetooth Version | V5.4 |
| Bluetooth Chip Type/Model | nRF54L15-QFAA |
| Bluetooth Transmission Frequency | 2.402～2.480 GHz |
| Bluetooth Transmission Power | ＜0dBm(-6dBm) |
| Bluetooth Transmission Range (In Open Space Without Obstacles) | >10 meters |
| Battery & Power | |
| Easy Battery Replacement | ▲ Yes |
| Battery | CR2032 |
| Standby Time | 3 years |
| Working Hours | 400h |
| Shutdown Current | ＜10uA |
| Operating Current | ＜10 mA |
| Alarm Voltage | 2.7V |
| Power-Off Voltage | 2.6V |
| Rated Voltage | 3.0V |
| Controls & Indicators | |
| Button | A physical button |
| Indicator Lamp | Supported, with three colors: red, green and blue |
| Environmental | |
| Operating Temperature | 0℃~ +55℃ |
| Storage Temperature | -20℃~ +55℃ |
| Operating Relative Humidity | 45~85%RH |
| Construction & Fit | |
| Removable Sensor Module | ▲ Yes |
| Replaceable Chest Strap | ▲ Yes |
| Weight Of Smart Module | 12.8 g |
| Weight of XS/S Chest Strap | 37.4 g |
| Weight of M/L Chest Strap | 41.3 g |
| Smart Module Dimensions | 36.5mm x 36.5mm x 8.5mm |
| Chest Size Range | XS/S: 66-102 cm, M/L: 74-125 cm |
| Water Resistance Depth | 30 m (suitable for swimming) |
| Module Material | Stainless steel cover plate + fiber reinforced composite material |
| Chest Strap Material | Polyamide/elastane on polyurethane contact surfaces |
| Chest Strap Construction | Silicon features to keep belt securily in place during workout. ESD protected measurement electrodes. |
| Care | |
| Cleaning Instructions | Rinse after each use. After 2-3 uses, remove the smart module and machine-wash the chest strap at 30°C. Never use any fabric softener. |
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