This is a joint review and installation with "Christopher". As he mentioned before he had ordered a pair and I happened to install them for him and over the past three days we have ridden with them twice and here's how it worked!
Here is the general overview of what this device can do.
General
Talk time: up to 13 hours
Standby time: 7 days
Charging time: 3 hours
Certificates: FCC, IC,CE, Bluetooth®
Bluetooth® version 2.1 class 1
Chip manufacturer: Cambridge Silicon Radio (CSR)
Battery type: Rechargeable Li-Polymer
Digital Signal Processing (DSP) for advanced audio
Snowmobile Intercom
4-Way (2 riders and 2 passengers)
3-Way (3 separate snowmobiles)
2-Way (rider-to-rider or rider-to-passenger)
Mobile Phone Conference Mode (rider, passenger, outside caller)
GPS (requires headset profile)
Compatible with most major Bluetooth GPS devices
GPS voice instructions override music, FM Radio and Intercom calls
Supported Mobile Phone Profiles and Functions
Headset and Handsfree profiles
A2DP/AVRCP profile for wireless streaming stereo from MP3 player or other A2DP device
Voice Dial
Redial
Call Reject
Conference mode between outside caller, Driver and Passenger
Built-in FM Radio
87.5 MHz to 108 MHz FM receiver
RDS functionality (adjusts to best frequencies according to zones)
6-station memory with Search and Store functions
Automatic radio muting for incoming calls
Software Update
Software update-ready directly from PC (requires Windows® XP™, Vista™ or Windows 7 based PC)
MP3 / Music
Wireless MP3 music (A2DP) or through cable connected MP3 player
Mechanical / Functional Features
Fits virtually all snowmobile helmets
Quick-Release mechanism to detach Snowmobile Bluetooth headset from clamp
Glue-On Option included (in lieu of clamp attachment)
Corded microphone and two slim speakers fit even the tightest full-faced helmets
Multiple control buttons
Mobile phone
Channel to Rider A
Channel to Rider B
Volume Up
Volume Down
FM Radio
MP3 Player
Audio Features
Multi-Lingual Spoken Status Announcements
Specially Calibrated Noise Cancellation Microphone
AGC technology: automatic volume adjustment of audio signals according to riding speed and ambient noise (AGC covers audio from MP3 Player, Mobile Phone, Intercoms, GPS)
VOX technology: accept or reject calls by voice commands
Design
Flip-Up Antenna for intercom extended range of up to 1 mile
Fully rain and snow resistant
Rugged and streamlined design
Charger
110/240V 50/60Hz Universal Travel Charger
Charger unit uses USB cable that also serves as software download cable.
Compatible with entire scala rider product line**

Here is the general overview of what this device can do.
General
Talk time: up to 13 hours
Standby time: 7 days
Charging time: 3 hours
Certificates: FCC, IC,CE, Bluetooth®
Bluetooth® version 2.1 class 1
Chip manufacturer: Cambridge Silicon Radio (CSR)
Battery type: Rechargeable Li-Polymer
Digital Signal Processing (DSP) for advanced audio
Snowmobile Intercom
4-Way (2 riders and 2 passengers)
3-Way (3 separate snowmobiles)
2-Way (rider-to-rider or rider-to-passenger)
Mobile Phone Conference Mode (rider, passenger, outside caller)
GPS (requires headset profile)
Compatible with most major Bluetooth GPS devices
GPS voice instructions override music, FM Radio and Intercom calls
Supported Mobile Phone Profiles and Functions
Headset and Handsfree profiles
A2DP/AVRCP profile for wireless streaming stereo from MP3 player or other A2DP device
Voice Dial
Redial
Call Reject
Conference mode between outside caller, Driver and Passenger
Built-in FM Radio
87.5 MHz to 108 MHz FM receiver
RDS functionality (adjusts to best frequencies according to zones)
6-station memory with Search and Store functions
Automatic radio muting for incoming calls
Software Update
Software update-ready directly from PC (requires Windows® XP™, Vista™ or Windows 7 based PC)
MP3 / Music
Wireless MP3 music (A2DP) or through cable connected MP3 player
Mechanical / Functional Features
Fits virtually all snowmobile helmets
Quick-Release mechanism to detach Snowmobile Bluetooth headset from clamp
Glue-On Option included (in lieu of clamp attachment)
Corded microphone and two slim speakers fit even the tightest full-faced helmets
Multiple control buttons
Mobile phone
Channel to Rider A
Channel to Rider B
Volume Up
Volume Down
FM Radio
MP3 Player
Audio Features
Multi-Lingual Spoken Status Announcements
Specially Calibrated Noise Cancellation Microphone
AGC technology: automatic volume adjustment of audio signals according to riding speed and ambient noise (AGC covers audio from MP3 Player, Mobile Phone, Intercoms, GPS)
VOX technology: accept or reject calls by voice commands
Design
Flip-Up Antenna for intercom extended range of up to 1 mile
Fully rain and snow resistant
Rugged and streamlined design
Charger
110/240V 50/60Hz Universal Travel Charger
Charger unit uses USB cable that also serves as software download cable.
Compatible with entire scala rider product line**