Power type variation of FS-205
Double A (unit 3 battery) type easy to get
FS-205B
FS-205 is a portable type and it can operate for equal to or more than 10 hours when the eight alkaline double A batteries are used.
Anyway, it is long time use. Lithium ion type.
FS-205L
Direct attachment of the battery of V-mount type such as Sony lithium-ion battery is possible, and long operation is possible.
One-touch attachment to camcorder type
FS-205S
The adapter and the cable set to attach  the wireless holder to the back of Sony camera battery.
AA Battery Case Mixing Adaptor 20cm
BAT-205 MA-20
Adapter for FS-205 with alkaline double A (unit 3) battery operation. It realizes equal to or more than about 10 hour operation with the eight alkaline double A (unit 3) batteries. It realizes a simple mixing by FS-205/206 (20cm). It is possible to use as the input-side limiter function built-in 2ch mixer by using this mixing adapter.
Lithium-Ion Battery Adapter Mixing Adaptor 2m
PBU-L205 MA-200
Adaptor for direct attachment of the battery of V-mount type such as Sony lithium-ion battery is possible. Long operation is possible, if using a large-capacity battery. It realizes a simple mixing by FS-205/206 (2m). It is possible to use as the input-side limiter function built-in 2ch mixer by using this mixing adapter.
One-Touch Attachment Microphone Adaptor
SCA-205 MC-100
Adaptor for FS-205 to attach to the back of Sony battery, Canon 3pin (XLR 3pin) male-female cable x2, Canon 4pin-mini 4pin DC cable x1.
Adaptor for FS-205 to use consumer camera (1.5m). It is the adapter which made it possible to connect the microphone* to the camcorder which doesn't have audio input terminal.
The microphone*: It has the directive output with Canon terminal or 1 rank-up microphone.
Shoulder Belt
BLT-205
Set of the shoulder belt and the hardware to hang FS-205 from the shoulder.
Utilization at the dubbing and editing
The sound level difference which occurred in recording at editing and dubbing can be adjusted.
The performance limited to a hyper limiter
Hyper limiter built-in which was developed with the field mixer. It suppresses the excessive input of +30dB instantly and it prevents distortion of the sound. Also, even if it is suppressing the excessive input, the sound which doesn't exceed PEAK level is output just as it is and it makes more natural recording possible.
It has the switching type meter of VU/PEAK.
As for the meter to confirm a recording level correctly,  it is possible to change of the PEAK meter which suited digital and the VU meter to confirm the average level of the whole source in L/R independently.
Wide input/output setting
In microphone input, it has the phantom power of +48V for microphone and input change is 3 steps, -60 / -20 / +4 dB. It is possible to do the recording with wide range of input. The balanced output (Canon 3-pin) can do the +4, -20 / -60 dB 3 step change, and RCA corresponds to the consumer type recorder by the fixation of -10dBV too.
Hyper Limitter
The technology was adaped which was developed with the field mixer.
The 12 V drive. The hyper limiter unit of 2 input 2 output. The switching of 1 input 2 output, 2 input 2 output is possible. The technology was adapted which was developed with the field mixer. It has a limiter compress technology just as it is. It shows power to prevent the audio breakage under all the recording environment and it reduces the distortion of the sound. For future digital recording, it is essential one set.
Use with line / microphone combined
The input to the recorder is often line fixation and it is easy to occur sound distortion in sound recording on the field of 2 cameras, the 3 camera recording such as the drama and the lecture. FS-205/206 supports the line and microphone and can record the voice of each lecturer who has sound level difference on the average and suppress the distortion of the sound by the outbreak sound of the clapping and so on.

It prevents sound breakage in the shooting by the small camcorder which has the sound input terminal such as Sony Hi-Vision camcorder HDR-Z1JDVCAM, camcorder DSR-PD170 and so on, and it shows power as the support machine of the professional shooting.
Use as the simple 2ch mixer
It is possible to use as the 2ch mixer which had an input-side limiter function in using optional mixing adapter (MA-20/200).
Use in ENG/Field recording
FS-205S is attached to the back of the battery case of Sony camcorder, and it made a handling by 1 peace possible. It made the reduction of the sound recording mistake in one-man operation and more natural source recording possible.