This product is Discontinued
Empatica E4 EDA/GSR Wristband 
The E4 wristband is designed for researchers and physicians who are conducting research on physiology in daily life and is not for consumer use. It is flexible with tools for data recording and management as well as real-time streaming to the Empatica Realtime App both for Android and for iOS. It is also possible to measure PPG with the E4 in order to conduct Heart Rate Variability (HRV) studies.
The Empatica E4 has been discontinued and is no longer available for purchase. iMotions Lab will continue to support the E4 wristband.
Specifications
| Sampling frequency | EDA: 4 Hz (non-customizable); PPG: 64 Hz (non-customizable) |
| Resolution | EDA: 1 digit ~900 pSiemens; PPG output: 0.9 nW / digit |
| Range | 0.01 μSiemens – 100 μSiemens |
| Electrodes | Semi-permanent (screw in design); SUS03 stainless steel (standard) or Silver (Ag) plated with a metallic core |
| Electrode longevity | Lifetime (SUS03), 4–6 months (Ag) |
| Flash memory | Up to 60h of data storage |
| Data transfer | Bluetooth / USB 2.0 |
| LEDs | Green (2 LEDs), Red (2 LEDs) |
| Sensor output | Blood volume pulse (BVP) |
| Motion artifact removal algorithm | Combines different light wavelengths; Tolerates external lighting conditions |
| Dimensions | Case: 44x40x16 mm; Wrist: 110 – 190 mm |
| Weight | 25 g |
| Medically Certified | No |
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