Optimal Integration Designed jointly by Sena & Shoei, the SRL2 is a commuication system tailored specifically to the Shoei Neotec II helmet – is the upgraded version of the wildly popular Neotec modular helmet. The SRL2 is virtually undetectable from the outside of the helmet, & functions with a simple 3-button control. Connectivity Simplified A dual Bluetooth chip allows for up to 8 intercom connections as well as simultaneously listen to music & talk to other riders via Intercom using Audio Multitasking. When audio comes through the Intercom music will automatically decrease in volume, & return to a normal volume when riders stop talking over the Intercom. Simply pair the SRL2 with your smartphone to stream music, listen to GPS directions, & take & make phone calls. A Feature Set to Keep you Moving in the Right Direction Take your ride up a notch with the stellar feature set of the SRL2. In addition to the the Universal & Group Intercom features, the SRL2 offers music sharing & Sena’s Advanced Noise Control technology. Smart volume regulates the volume of your music when the environment outside of your helmet changes, due to wind noise or increased speed. Built in FM radio lets riders easily scan through & save radio stations. Stay connected & in control with the Sena Smartphone app Linking the SRL2 with the Sena Smartphone App (for iPhone & Android) means that you can configure device settings & access our quick guide at the click of a button. The SRL2 can also easily connect to the Sena Ride Connected App to intercom with a virtually limitless amount of riders over an infinite range, so long as you are connected to a mobile network. General Talk time: 10 hours Operating temperature: -10C ~ 55C (14°F ~ 131°F) Dimensions: Speaker: driver unit unit 31.9 mm – thickness 4.4 mm Wire mic Wire between speakers: length 85 mm Weight: Module: 100 g (3.53 oz) Bluetooth Headset Profile (HSP) Hands-Free Profile (HFP) Advanced Audio Distribution Profile (A2DP) Audio Video Remote Control Profile (AVRCP) Bluetooth 4.1 Intercom Working distance: up to 1.6 kilometers (1.0 mile) in open terrain Audio Advanced Noise Control™ Built-in SBC Codec Wide volume control Sample rate: max. 48 k Hz (DAC) FM Radio Built-in FM radio with RDS AF (Radio Data System Alternate Frequencies) Radio region: worldwide Radio frequency specifications: 64 ~ 108 M Hz 10 preset station memory with automatic scan function Battery Charging time: 2.5 hours Type: Lithium polymer In the Box SRL2 Headset Microphone Sponges USB (Universal Serial Bus) Power & Data Cable (Micro USB (Universal Serial Bus) Type)