The Planet Waves Acoustic Guitar Humidifier protects your guitar from damage due to dry environments. The Small Instrument Humidifier fits in any guitar case to maintain a healthy humidity level for your instrument.
For pedals with higher power requirements, use this current doubling adapter with a 2.1mm jack to combine two Pedal Power outputs. (Frequently used to combine outputs 5 & 6 on a Pedal Power 2+ to create a single 9V 500mA output.) This adapter will accept any cable with a 2.1mm plug.