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Router includes an enclosure, a circuit board located in the enclosure, a first expansion module, and a second expansion module. The first expansion module and the second expansion module are selectively coupled to the circuit board. When the first expansion module is coupled to the circuit board, t

Router includes an enclosure, a circuit board located in the enclosure, a first expansion module, and a second expansion module. The first expansion module and the second expansion module are selectively coupled to the circuit board. When the first expansion module is coupled to the circuit board, the router is used to build a local area network or a wireless network. When the second expansion module is coupled to the circuit board, the router is used to connect a plurality of electronic devices.

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1. A router comprising: an enclosure;a circuit board located in the enclosure, and the circuit board defining an accommodating space;a first expansion module, at least a portion of the first expansion module being selectively receivable within the accommodating space and couplable to the circuit boa

1. A router comprising: an enclosure;a circuit board located in the enclosure, and the circuit board defining an accommodating space;a first expansion module, at least a portion of the first expansion module being selectively receivable within the accommodating space and couplable to the circuit board; anda second expansion module, at least a portion of the second expansion module being selectively receivable within the accommodating space and couplable to the circuit board;wherein, with the first expansion module coupled to the circuit board the router is configured to establish a wireless network; andwherein, with the second expansion module coupled to the circuit board the router is configured to be connectable to one or more electronic devices. 2. The router of claim 1, wherein the first expansion module further comprises a securing member secured to the circuit board and an expansion member slidably received in the securing member, and the expansion member is connected to the circuit board. 3. The router of claim 2, wherein the circuit board defines a securing hole, and the securing member comprises a protruding tab engaged in the securing hole. 4. The router of claim 2, wherein the expansion member comprises a coupling module, and a connector is located on the circuit board to connect to the coupling module. 5. The router of claim 4, wherein the expansion member defines a through hole, and the coupling module extends through the through hole to connect to the connector. 6. The router of claim 1, wherein the second expansion module comprises a motherboard, and a plurality of coupling ports are located on the motherboard and configured to connect the plurality of electronic devices. 7. The router of claim 6, wherein the second expansion module further comprises a transfer board attached to the enclosure, and a plurality of exposing holes is defined in the transfer board for allowing the plurality of coupling ports to expose out of the enclosure. 8. The router of claim 7, wherein the motherboard defines a receiving hole, when the motherboard is secured to the circuit board, the connector is received in the receiving hole. 9. A router comprising: an enclosure comprising a bottom plate and a covering element engaged with the bottom plate; anda circuit board attached to the bottom plate and received in the enclosure; the circuit board defining an accommodating space;wherein, at least a portion of a first expansion module is selectively receivable within the accommodating space and couplable to the circuit board, and with the first expansion module coupled to the circuit board the router is configured to establish a wireless network; andwherein, at least a portion of a second expansion module is selectively receivable within the accommodating space and couplable to the circuit board, and with the second expansion module coupled to the circuit board the router is configured to be connectable to one or more electronic devices. 10. The router of claim 9, wherein the first expansion module comprises a securing member secured to the circuit board and an expansion member slidably received in the securing member, and the expansion member is connected to the circuit board. 11. The router of claim 10, wherein the circuit board defines a securing hole, and the securing member comprises a protruding tab engaged in the securing hole. 12. The router of claim 10, wherein the expansion member comprises a coupling module, and a connector is located on the circuit board to connect to the coupling module. 13. The router of claim 12, wherein the expansion member defines a through hole, and the coupling module extends through the through hole to connect to the connector. 14. The router of claim 9, wherein the second expansion module comprises a motherboard, and a plurality of coupling ports are located on the motherboard and configured to connect the plurality of electronic devices. 15. The router of claim 14, wherein the second expansion module further comprises a transfer board attached to the enclosure, and a plurality of exposing holes is defined in the transfer board for allowing the plurality of coupling ports to expose out of the enclosure. 16. The router of claim 15, wherein the motherboard defines a receiving hole, when the motherboard is secured to the circuit board, the connector is received in the receiving hole.