Jabra GO 6400 Replacement Wireless Headset for use with GO 6400 Base (Base Not Included) Multi-device Connectivity - Multi-device connectivity technology lets you manage phone calls from several different devices such as desk phones, tablets, PCs and smartphones, with one single headset. Smartphone & Tablet Ready 150m Wireless Freedom - Get wireless mobility up to 150 meters to fully control your Jabra hands-free solution with DECT technology. Answer calls, multitask and move freely around on your terms. HD Voice - High quality audio for crystal clear conversations Enjoy high-definition sound with HD Voice and get crystal clear, intelligible communication