The FM-3 from Fostex is a battery-powered 3 channel professional field mixer with an additional multi-pin auxiliary input and output, and lots of other useful features. Designed for location work in video, film, and remote recording situations, the FM-3 is packed with tools that will help you capture the highest quality audio in these demanding environments. Its organic LED display has adjustable brightness controls and informs you of the mixer's current settings, battery power, and metering.
Most of the controls on the FM-3 have a dedicated hardware switch, knob, or button. The multi-pin auxiliary input can be sent to the stereo bus output, or used to cascade multiple mixers. In addition to the main XLR and multi-pin sub outputs, the FM-3 has two separate headphone outputs, a tape output, and an auxiliary output. You can switch the audio being sent to the auxiliary output from channels 1 and 2, 2 and 3, 1 and 3, and stereo mix or mono mix.
The FM-3 operates on 8 AA batteries which slide in and out of the mixer in a magazine. You can also receive power from an external battery. The FM-3 features a handy DC output, so you can share its power with other equipment in your bag, such as a wireless receiver. Each channel has a variable high-pass filter knob, trim control, signal/peak LED, PFL button, and pan switch. The master output level knobs, channel trims, and filter knobs all can be set and pushed back into the mixer so they don't get accidentally adjusted.