Brand new sealed fit bit sense 2 retail value $250 Gender neutral What's in the box Fitbit Sense 2 Classic band (small & large) Charging cable Dimensions and weight Length: 1.59 in (40.5 mm) Width: 1.59 in (40.5 mm) Height: 0.44 in (11.2 mm) Weight: 0.08 lb (37.64 g) Battery and power Battery life of 6+ days. Battery life and charge cycles vary with use, settings and other factors; actual results will vary. Use of the always-on display, SpO2 and the cEDA sensor will require more frequent charging. Up to 5 hours with continuous GPS. We recommend charging your tracker every few days to ensure you are always tracking. Memory Saves 7 days of detailed motion data, minute by minute Environmental requirements Operating temperature: -14° to 113°F Sensors and components Multi-path optical heart rate sensor Electrical sensor to measure skin conductance (cEDA) for body response tracking Multipurpose electrical sensors compatible with ECG app & EDA app. ECG not available in all countries. Red and infrared sensor https://store.google.com/product/fitbit_sense_2_specs?hl=en-US