CONNECTIVITY FOR A SMALL GROUP OF RIDERSThe SFR Bluetooth communication system has 4-way intercom functionality, providing connectivity perfect for small groups of riders. The SFR's intercom has a range over 1.2 kilometers (.8 miles) so you can stay easily connected with your friends in open terrain. Plus, the slim SFR connects to a smartphone, MP3 Player or GPS so that you can easily listen to music, hear turn-by-turn GPS directions and make phone calls. Most importantly, riders can listen to music and use the intercom simultaneously, using the Audio Overlay™ feature. EASY, SLEEK HELMET ATTACHMENTThere are no clamps or screws needed to connect the device to your motorcycle helmet. Simply use the hook & fastener or double-sided adhesive tape to securely attach the SFR Bluetooth device to your motorcycle helmet. Plus, with the SFR's quick charging capabilities, you will be ready to start your ride in no time. ALWAYS BE CONNECTED WITH MOBILE APPSLink the Sena SFR Bluetooth device to the Sena SF Utility App (available for iPhone and Android) to easily configure device settings and quickly access guides. You can also sync your SFR to the Sena RideConnected App, which allows for a virtually limitless amount of riders over an infinite range, as long as young as you are connected to a mobile network. What's In The Box- SFR main unit- Hook and Loop Fastener for Main Unit (male) x2- Hook and Loop Fastener for Main Unit (female) x2- Double Sided Adhesive Tapes for Main Unit x2- Wired Boom Microphone- Wired Microphone- Microphone Sponges x2- Speakers x2- Hook and Loop Fasteners for Speakers x2- Hook and Loop Fasteners for Wired Boom Microphone- Hook and Loop Fastener for Wired Microphone- Boom Microphone Holder- Hook and Loop Fastener for Microphone Holder- USB Power & Data Cable- SFR Quick Start Guide(SFR-01) GENERAL Talk Time: 13 hoursOperating temperature: -10°C - 55°C (14°F - 131°F)Dimensions:- Main unit: 73.4mm x 39.3mm x 19.7mm- Standard Speaker: driver unit 38mm - thickness 10mm- Wired Boom microphone: length 183 mm- Wire between speakers: length 630 mmWeight: main module 44.5g BLUETOOTH Bluetooth 4.1Headset Profile (HSP)Hands-Free Profile (HFP)Advanced Audio Distribution Profile (A2DP)Audio Video Remote Control Profile (AVRCP)INTERCOM Working distance: up to 1.2km (0.8miles) in open terrainSupports up to 4 ridersAUDIO Advanced Noise Control™- Built-in SBC Codec- Wide volume controlSample rate: max. 48 kHz (DAC)FM RADIO Built-in FM radio with RDS AF (Radio Data System Alternate Frequencies)Radio region: worldwideRadio frequency specifications: 64 ~ 108MHz10 preset station memory with automatic scan functionBATTERY Charging time: 1.5 hoursQuick Charge: 30 minutes of charging equals 4 hours intercomType: Lithium Polymer BatteryCERTIFICATES Electronics: CE, FCC, IC SKU SFR-01Barcode # 885465007395Brand SENAShipping Weight 0.3940kgShipping Width 0.200mShipping Height 0.063mShipping Length 0.120mShipping Cubic 0.001512000m3