Features Stereo direct box for laptops, smartphones, and tablets Cable with 3.5mm stereo plug to connect to mobile devices Transformer isolation eliminates hum and buzz Plug & play easy to use, no power required Compact design fits in your laptop bag Specifications Audio circuit type: Passive, transformer based Number of channels: Two channels Frequency response: 20Hz ~ 20KHz (± 1dB) Dynamic range: 100dB Total harmonic distortion: 0.01% @ 1kHz Phase Deviation: 2° @ 100Hz; 5° @ 50Hz Input Impedance: 40k Ohms, unbalanced Output Impedance: 2.8k Ohms, balanced Maximum Input: +20dB Input pad, Mono Sum, Ground lift Input Connectors: 3.5mm Output Connectors: 1/4 TRS, XLR Construction: 14 gauge steel chassis & outer shell Size (L x W x D): 4.5 x 1,85 x 1.35 (114mm x 47mm x 34mm) Weight: 0.55 lbs (250 grams) Shipping size (L x W x D): 8 x 5 x 3 (203mm x 127mm x 76mm) Shipping weight: 0.8 lbs (365 grams) Power: Passive, no power required Conditions: For use in dry locations only between 5°C and 40°C Warranty: Radial 3-year, transferable