The Astroskin Device is a removable and reusable data recorder that includes a 3-axis accelerometer, and a Bluetooth 2.1 radio. The system is powered by two AA batteries, which can be replaced. The system allows the continuous physiological monitoring of the five primary vital signs without interruption for 48 hours of autonomy allowing uninterrupted continuous health monitoring with high-resolution data. The Astroskin Device is compatible with any Astroskin Shirt for Men & Women. Astroskin is compatible with the Astroskin apps for iPhones & iPads, Hexoskin OneSync data synchronization software, and the Astroskin web dashboard. The Astroskin Device Includes: 1 Astroskin Recorder & USB Cable Astroskin Device Specifications: 400+ hours of local raw data storage Bluetooth 2.1 Communications Autonomy: 48 h 2x AA rechargeable batteries (not included) Device Dimensions: 62 x 78 x 23 mm / 3 x 2.4 x 2.5 in Device Weight: 75 g (without batteries)