At just 9 grams, the Plantronics Voyager Edge is ultra lightweight and comfortable to wear. It syncs with your smartphone to announce who's calling, and you can use voice commands to answer or ignore calls. Check the battery level easily using the indicator lights or on your smartphone screen. When you're on the go and running low, the portable charging case adds up to 10 hours of talk time. Uses Bluetooth 4.0 for wireless connectivity to your mobile device; also supports NFC for quick pairing.