ALESIS Photon 25 - Manual (Page 5)

3
Rear-Panel Connections
1. External Adapter Jack – Plug in the AC adapter if you don't want to power
the Photon 25 through either the USB connection or four "C"-size batteries. (Use
a 6VDC, negative tip, 1000mA device.)
2. Power Source Selector – Press this switch IN to power the Photon 25 from
either four "C"-size batteries or an optional external power adapter. If both an
AC adapter and batteries are present, the AC adapter will be used rather than the
batteries.
Leave this switch OUT to power the Photon 25 from a computer's USB
connection or to turn off the unit when USB power is not present.
Notes: When using a laptop computer, consider using batteries to prolong the
laptop's operating time between charges.
Load batteries on the bottom of the Photon 25.
3. USB Connector – Plug a standard USB cable into this outlet and into a USB
1.1 or higher connector on your computer.
4. MIDI IN Connector – Use a five-pin MIDI cable to connect the OUTPUT
of an external MIDI controller to the MIDI IN of the Photon 25.
If you use an external MIDI IN device, your computer will recognize it as a
second MIDI IN controller.