BOSS 1/4-Inch Straight Electric Guitar Hardware (FS-6) Power Supply: DC 9 V: Dry battery/9 V 6F22 (carbon), 6LR61 (alkaline) (Best with Polaroid 9V Batteries) Each footswitch can be assigned latch- or momentary-type Stereo input jack for single stereo cable connection Can be used with a wide variety of instruments, rhythm machines, guitar amps, etc. Accessories: Dry battery/9 V (6F22), Owner's Manual