Amazon Echo Dot (5th Gen) Black

Size
3.9” x 3.9” x 3.5” (100mm x 100mm x 89 mm)
Weight
10.7 oz (304g) Actual size and weight may vary by manufacturing process
Audio
1.73” (44 mm) front-firing speaker, Lossless High Definition
Wifi connectivity
Dual-band Wi-Fi supports 802.11a/b/g/n/ac (2.4 and 5 GHz) networks. Does not support connecting to ad-hoc (or peer-to-peer) wifi networks.
Amazon Sidewalk
A shared network that can simplify Echo device setup and can help your device reconnect to your wifi router when you update your password or network name. Sidewalk uses a small portion of your internet bandwidth to provide these services to you and your neighbors, and is enabled on your device unless you have previously disabled the setting. You can disable Sidewalk at anytime. Learn more here.
Smart Home Protocols
WiFi, Bluetooth Low Energy Mesh, and Matter controller (Alexa Android app setup only. iOS coming soon).