Plantronics Explorer 502 Bluetooth Wireless Headset - White Bluetooth 4.1 interface allows you to wirelessly link with most Bluetooth-enabled devices from up to 33' away. The headset can connect to up to 2 devices simultaneously. GSMA-certified HD Voice Along with noise- and wind-canceling technologies enables crystal-clear communication. Smartphone voice control lets you control functions simply by speaking. Volume control allows you to adjust the listening level. Rechargeable battery offers up to 7 hours of talk time and up to 6 months of standby time per full charge.