The BiKom 20 is Sena's lightest communication system for cyclists and other outdoor adventurers. With its versatile mounting options, BiKom 20's sleek and lighweight design make it the best way to integrate a Mesh communication system with any helmet or cap. Weighing in at only 20 grams, the BiKom 20 is so light that you won't feel like you're wearing a communication headset. Clip the BiKom 20 to your helmet or your cap and talk with friends while still being able to enjoy the sound of nature.