Quantum 6 vdc modules are inserted in place of the AA cells and connect to 6-volt DC power source.

• Quantum designates the MG2 for the 300TL.
• Quantum designates the MF2 for the 300EZ.
• Quantum designates the MF3 for the 380EX and 420EX.
• Quantum designates the MZ2 for the ML-3, 420EZ and 430EZ.
• Quantum designates the MKZ for the 540EZ and 550EX.
• The MG2 and MZ2 adapters are identical in size and shape and differ only in that the MZ2 has a 3 volt center-tap (unused by Canon speedlites).  The MG2 and MZ2 adapters are interchangeable for Canon speedlites ML-3, 300TL, 420EZ and 430EZ.