ITEM NAME:USB Aux-in Switch For RCD510+ Description: Material: Plastic and Metal Size: Approx 33.5*22*35mm Made of premium plastic and metal,provide high speed data transfer and no loss of sound quality. Fit for RCD510+,RCD310+, RCD300+。 Package Includes: 1 Piece USB AUX Switch Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making.Fit for RCD510+,RCD310+, RCD300+。. 1 Piece USB AUX Switch. Due to the difference between different monitors, the picture may not reflect the actual color of the item.