Optimal Integration Designed jointly by Sena and 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, and 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 and talk to other riders via Intercom using Audio Multitasking. When audio comes through the Intercom music will automatically decrease in volume, and 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, and take and 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 and Group Intercom features, the SRL2 offers music sharing and 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 and save radio stations. Stay connected and in control with the Sena Smartphone app Linking the SRL2 with the Sena Smartphone App (for iPhone and Android) allows you to configure device settings and access our quick guide at the click of a button. The SRL2 can also easily connect to the Sena RideConnected 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 kHz (DAC) FM Radio Built-in FM radio with RDS AF (Radio Data System Alternate Frequencies) Radio region: worldwide Radio frequency specifications: 64 ~ 108MHz 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 Power & Data Cable (Micro USB Type)