| Jawbone UP4 | |
 | |
| Tech specs | |
| Size | 220mm x 12.2mm x 3.0mm-9.3mm |
| Material | medical-grade hypoallergenic TPU rubber strap; anodized aluminum casing (with less than 0.5% nickel); TiN-coated stainless steel clasp |
| Charging | Magnetic USB cable |
| Battery | Rechargeable lithium polymer, 38 mAh battery |
| Battery life | UP to 7 days |
| Water-resistance | Water resistant up to 10m |
| Weight | 29 grams |
| Sensor | Accelerometer, Bio-impedance, Skin Temperature, Ambient Temperature, NFC |
| Display | Three single color LEDs - Blue for sleep; orange for activity; and white for notifications |
| Screen size | |
| Colors | Silver, Black |
| Other | |
| Activity tracking | |
| Steps | Yes |
| Distance | Yes |
| Calories burned | Yes |
| Activity | Yes |
| Floors | |
| Sleep | Yes |
| Heart rate | Yes |
| Vo2Max | |
| Stress & recovery | |
| UV exposure | |
| Skin temperature | Yes |
| Galvanic skin response | Yes |
| Hydration level | |
| Calorie intake | |
| GPS | |
| Running features | |
| Swimming features | |
| Other | Pace, Respiration, Ambient Temperature. You can connect your UP4 band to an eligible American Express Card* for payments on the go at participating stores. |
| Non-fitness functions | |
| Smartphone notifications | |
| On-board music storage | |
| Connected pay | |
| 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.