Communication System - Contour-X ACS10 Communication System The Sena ACS10 is a Bluetooth communication system designed specifically for the Arai Contour-X motorcycle helmet. The discrete ACS10 headset consists of HD Speakers, a microphone, three-button control, and a battery, which are easily installed into the helmet. The ASC10 was designed for the exact interior recesses of the Contour-X, allowing for the perfect fit. The ACS10 provides high quality sound with Sena’s outstanding HD speakers. The HD speakers offer a marked increase in bass and audio clarity for music, intercom conversation, phone calls and more. In addition to HD Speakers the ACS10 also features Sena’s Advanced Noise Control™ technology, which filters out wind and white noise in order to deliver crystal clear audio The ACS10 allows for four-way Bluetooth intercom with a working distance up to 1.6 km (1.0 mi). Riders can also pair their smartphone in order to hear turn-by-turn GPS directions, listen to music, or even take a call...all from within their Arai Contour-X helmet Link the ACS10 with the Sena Utility app to control many of the device’s functions from your fingertips General Operating temperature: -10°C – 55°C (14°F – 131°F) Talk time: up to 10 hours Charging temperature: 0°C – 45°C (32°F – 113°F) Main module: 77 mm x 68 mm x 58 mm (3" x 2-11/16" x 2-5/16") Wired Microphone: length 200 mm Wire between speakers: length 100 mm Speaker driver unit: 40 mm – thickness 7.2 mm Intercom Working distance: up to 1.6 kilometers (1.0 mile) in open terrain Supports up to 4 riders Battery Talk time: 10 hours Charging Time: 2.5 hours 2 built-in 300 mAh lithium polymer battery