| TECH SPECS | |
| Charging | up to 2 hours via micro USB |
| Battery | Lithium ion |
| Battery life | talk/music time: up to 5 hours standby: up to 10 days |
| Water resistance | IP55 Certified, drop, strength, dirt, temperature & humidity tested |
| Weight | 16 grams each |
| Sensor | Accelerometer, heart rate sensor |
| Connection | Bluetooth |
| Sound | Passive Noise Reduction: 15dB Speaker size: 6 mm dynamic speaker Speaker sensitivity: 94dBSPLat1mW/1kHz Speaker max input power: 5mW Speaker frequency range 20Hz-20kHz |
| Controls | Touch controls |
| Other | in-line remote and microphone for making cell phone calls Microphone type: MEMS microphone solution Answer/end call, reject call, voice dialing*, last number redial*, volume control, track control, play/pause music, Voice guidance |
| METRICS | |
| Steps | Yes |
| Distance | Yes |
| Calories | Yes |
| Activity | Yes (interval training, zone training, target pace training, measuring time) |
| Floors | No |
| Sleep | No |
| Heart rate | Yes |
| VO2 Max | Yes |
| UV exposure | No |
| Skin temperature | No |
| Galvanic skin response | No |
| GPS | No |
| Notifications | No |
| Other metrics | |
| LINKS | |
| Affiliate link* | Amazon |
| Read more | Article |
**All tech specs and images on this page come from manufacturers. These may change over time as manufacturers sometimes update their devices. While we cannot guarantee absolute accuracy of information on this page, we promise to review this content regularly and do our best to bring you the most up-to-date information. To be absolutely sure of tech specs of a particular device, we recommend checking the manufacturer’s website.