Wireless audio systems are great for streaming music from room to room, but they’re practically essential when it comes to playing your tunes outdoors. Best Buy’s private-label Rocketfish system delivers an innovative solution with a budget price tag of just $185.The system consists of a 2.4GHz wireless transceiver that you connect to an analog sound source (a PC, A/V receiver, MP3 player, Squeezebox, etc.), and a speaker with a wireless receiver. The transceiver requires A/C power, but the speaker can run on either A/C or eight C-cell batteries (not included). We tested the Rocketfish for 11 hours and 45 minutes before exhausting a fresh set of alkalines, but the speaker will also run on—and recharge—eight 5,000mAh NiMH C-cells.