American Audio Pocket Record: Wav or mp3 recording. SD card up to 32GB. 2 1/4 inch line/mic/guitar inputs with gain knob, but sensitive inputs, so don't put too much level on them. You can playback your mixes from the device, and it's easy to navigate it.
You can also connect dynamic mics directly to the recorder (into the 1/4 inch inputs) and while it's recording both mics, it can record both the left and right into separate tracks in the same time, and as I know you can monitor your recording, from a 1/8 headphone jack...
NiCD/Nimh Battery or alkaline powered (battery selection for different battery types)
USB connection with PC, and charges also via USB.
About a $100 or $150 u can get one:)
Probably if you got a Record output on your mixer, good solutin 'cause of the ability of setting input levels:)
English Manual