Plantronics Marque M155 Bluetooth Headset - Black, Bulk Packaging Mono Bluetooth headset with excellent sound quality and an amazingly lightweight design Stream music, podcasts, internet radio, GPS directions and more Vocalyst service lets you use your voice to manage emails, texts and update Facebook or Twitter Talks you through pairing process for iPhone and Android smartphones Up to 5 hours of talk time, up to 216 hours (9 days) of standby time; full charge in 2 hours