Retro Design, Handcraft Genuine Leather Cover, and CNC Metal Brushed Panel · Carbon Fiber Speakers for reproducing accurate sound · No sound loss with Wi-Fi protocol during transmission to HIFI devices · Two modes, direct connection and router mode. Router mode allows multiple users to stream through home Wi-Fi network · Switch easily between audio sources, up to 16 devices without logging out · Apple? Airplay? lets you stream music wirelessly from your iPod touch?, iPhone?, iPad?, or Mac · Exclusive GGMM App allows users to connect, access stored music and access to online radio function