The Zoom APH-4n Accessory Pack for H4n is designed for DSLR
users. The APH-4n Accessory Pack includes a windscreen, a hot shoe mount, an
RC4 remote controller, an attenuator cable and a splitter cable.
The hot shoe mount attaches the H4n to your DSLR camera. The
RC4 remote controller allows REC, PLAY, STOP and other functions. The
attenuator cable connects the H4n line output to the camera mic input. The
splitter cable allows simultaneous headphone monitoring.