
What's Inside the Watch
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Bluetooth Smart Enabled

Rugged and Durable Design
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25-Days Battery Life
ActiGraph wGT3X-BT
Reliable
The wGT3X-BT is ActiGraph’s legacy/original wearable device for continuous, real-world monitoring of activity, mobility and sleep:
- Versatile Wear Locations: wGT3X-BT offers maximum wear position flexibility with options for wrist, waist, ankle and lumbar worn devices.
- Ambient Light Sensor: Integrated light sensor that delivers lux values alongside motion data, providing insights into the relationship between the participant environment and activity and sleep behaviors.
- Wear Time Sensor: Wear time sensor on the back of the device uses capacitive touch technology to automatically detect when a wrist worn device has been removed.
ActiGraph wGT3X-BT is compatible with

Woven Nylon Wristband

wGT3X-BT Belt Pouch

USB Cable

Elastic Belt
ActiGraph wGT3X-BT Specifications
The ActiGraph wGT3X-BT is optimized for everyday activity & sleep monitoring
Specifications
- Battery Life: 25 Days
- Data Storage: 180 Days / 4GB
- Sample Rate: 30-100 Hertz
- Dynamic Range: +/- 8G
- Dimensions: 4.6 x 3.3 x 1.5 cm
- Wear Location: Wrist, Waist, Ankle, Thigh
- Weight: 19 grams
- Communication: USB, Bluetooth® LE
- Water Resistance: IPX7 (1 meter, 30 minutes)
- Warranty: 1 year
Measurements
Physical Activity
- Total Movement
- Moderate to vigorous physical activity (MVPA)
- Non-sedentary time
- Step count
- Energy Expenditure
Sleep
- Total sleep time (TST)
- Sleep efficiency (SE)
- Wake after sleep onset (WASO)
- Sleep onset latency (SOL)
- Sleep fragmentation index