Disclaimer: I am by no means a hi-fi enthusiast, only a fellow music lover. Oh and the unit is a loner to me.   Hard paper box     Content inside     The unit itself, SH306A   FEATURES DISPLAY INDICATOR - Blue light will emit (on the Shonyun logo itself, and with red colour when you plug in the power adapter - the only visual indication that the device is now powered up and ready to be use) upon insertion of headphone jack to the amp line IN. A mechanism to indicate the level of battery would be a nice useful added feature...