A stable, manually portable floating electronic platform for use in pools and spas is equipped with recesses for receiving beverage containers and is equipped with any of a variety of electronic audiovisual entertainment devices that are powered by an on-board battery, or a remote rechargeable battery or a conventional remote low-voltage power supply unit via a power cable. Each clutch disk has a torsional vibration damper arrangement including two cover disk elements connected to the hub area for rotation in common, and a central disk element connected to the friction surface area for rotation in common. The RFID system also provides an ear tag, which may be in button form, for use on livestock with superior durability and overall performance in the field. The press section of the connector is passed through the through hole of tank body, and is riveted and secured on an inner side of the tank body.