Cellular: 4G LTE and UMTS for connected features and calls without your phone nearby.
Bluetooth: Versions vary, with the original Pixel Watch using Bluetooth 5.0 and newer generations like the Pixel Watch 3 and 4 featuring Bluetooth 6.0.
Wi-Fi: Supports 2.4 GHz, and newer models also support 5 GHz and Wi-Fi 802.11ac/ax for faster connections.
NFC: For contactless payments and other features.
GPS: Supports multiple global navigation satellite systems for accurate location tracking.