Radial StageBug SB-5, Stereo DI for Laptops and Mobile Devices, Passive, Radial Item R800 0150 00. The StageBug SB-5 is a compact and portable stereo direct box designed to accommodate consumer audio products when amplifying the signal through a PA system. The built-in cable connects directly to your laptop, smartphone, or tablet with a 3.5" stereo connector. Inside, a pair of custom wound transformers isolate the signals to prevent hum and buzz, and balance the audio to feed long cable runs without noise. Left and right 1/4" TRS outputs are provided for stereo operation, or a mono XLR output can be used to save channels on the PA system. ??Stereo direct box for laptops, smartphones, and tablets ??Transformer isolation eliminates hum and buzz ??Plug and play easy to use, no power required ??Ground lift switch to eliminate ground loop noise ??Pad switch to prevent distortion from high-output audio sources