The Sena STL-03 GT-Air 3 Communication System is made exclusively for the Shoei GT Air 3 and Neotec 3 motorcycle helmet. It offers 10 hours of talk time with a working distance of 1 mile in open terrain and supports up to 8 riders. It also features Bluetooth 5.0 with Advanced Noise Control and built-in SBS Codec with an FM Radio and 10 station present memory. It has a 2.5-hour charging time with Lithium Polymer battery. It has an operating temperature of -10˚C ~ 55˚C (14°F ~ 131°F), a charging temperature of 0˚C – 45˚C (32°F – 113°F), and dimensions: speaker: driver unit 31.9 mm – thickness of 4.4 mm. Boom microphone: length 55 mm. Wire between speakers: length 85 mm. Weight: main module - 100 g (3.53 oz).