The AirPort Express Generation 2 functioned as a wireless access point, to extend the range of a network, as an Ethernet-to-wireless bridge, as a print server, and/or as an audio server. This model allowed up to 50 networked users using the 802.11a/n Wi-Fi standard.
Connectors included an audio connector that combined a 3.5 mm minijack socket and a mini-TOSLINK optical digital connection. On August 28, 2018, AirPlay 2 support was added to the Generation 2 AirPort Express, giving it features similar to HomePod.
Source: Wikipedia
