Up to 8 trusted devices, 2 active stand-by Bluetooth connections. General. Packaging dimensions (L x W x H) L 21.0 x W 18.1 x H 5.3 cm. Weight mono / duo. Mono headset 79g, Stereo headset 111g. Whats in the box. Pouch, Evolve 65 Headset, Warning leaflet, Warranty leaflet, Quick Start Guide, Foam inlay (available for DUO only) Warranty.