# Hardware specs
## Summary
The sensor collects secure, anonymous foot traffic counts using thermal sensing and machine learning algorithms. It attaches to the top of any single or double sized door frame, using a magnetic mounting plate installed with adhesive strips. It can be installed in 5 minutes without any technicians or drilling needed.
## Device Specifications
* **Size:** 7.70 in x 1.92 in x 1.93 in (195 mm x 49 mm x 49 mm)
* **Weight:** 0.80 lbs (363 g)
* **Power:** 1-2 years of battery life, optional 5V DC (see [Powering your device](/dtm-docs/hardware/setup/powering-your-device.md))
* **Battery:** Replaceable high energy lithium batteries or Alkaline (see [Powering your device](/dtm-docs/hardware/setup/powering-your-device.md))
* **Optimal Door Dimensions:** Height - Up to 12 ft (3.6 m) Width - Up to 8 ft. (2.4 m) (see [Doorway Compatibility](/dtm-docs/hardware/installation/doorway-compatibility.md))
* **Wireless:** Wi-Fi 802.11b/g/n, 2.4GHz/5.0GHz, WPA2 encryption, Bluetooth low energy, LoRaWAN (see [Connectivity Requirements](/dtm-docs/hardware/setup/connectivity-requirements.md))
## Sensor Diagram
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