Two used but in excellent condition and full working order BMW BIKE-TO-BIKE COMMUNICATION MODULES? Communication for up to six motorcycles and twelve participants. Communication range with the communication module Bike-to-Bike of up to 300 m between two bikes, and up to 2 km within a group. Charging option during the journey on every vehicle with navigation preparation. Only one module is required for rider and passenger. Compatible with BMW Motorrad V3 communication systems. Battery life: depending on use up to 9 hours (1400 mAh). Also included are two waterproof pouches to store the units in when in use. See my other listing for another pair of identical modules.