Get $50 Off On Insignia Compact Shelf System At Bestbuy.com. Play back audio from a wide range of sources with this Insignia compact shelf system, which features Bluetooth technology, a USB port and a CD player for flexible use. The FM tuner features 30 presets for simple station recall. The Bluetooth technology allows simple wireless connection of a compatible device. It provides 50 W power output for reinforced, dynamic sound. The digital FM tuner with 30 station presets makes it easy to listen to the favorite stations.