Abstract: A portable piece game set comprises a gameboard and a plurality of pieces. The gameboard includes two boards, where on an inner surface of a first board has a plurality of recessed piece seats for placing pieces, and a second board is connected with and used for covering the first board. Each piece includes a holding part and a positioning part, where the holding part is used for players to position or place the piece and the positioning part is fit with the recessed piece seat for placing the piece on the inner surface of the first board.

Abstract: A housing comprises a rigid container and a lid adapted to fit the rigid container, wherein the rigid container is adapted to accommodate an audio device. A hub with an external recess is formed at an end of the housing. A latch has a buckle and a chuck, wherein the buckle is used for locking the lid with the rigid container, resulting in waterproofing, and the chuck is used for driving the buckle moving and releasing the lid. A control panel is located on the housing for externally controlling the audio device. An audio jack is located in the hub for electric connecting the audio device. An adaptor for sealing and engaging with the hub has a waterproof seal, a plug and a knot on the interior wall of the adaptor.