BLUETOOTH® V1.1 COMPLIANT; SUPPORTS HEADSET & HANDSFREE PROFILES; SMALLEST & LIGHTEST BLUETOOTH® WIRELESS HEADSET—WEIGHS ONLY .28 OZ & IS 2.7"; REMOVABLE EAR-HOOK FITS EITHER EAR; COMPATIBLE WITH VARIOUS BLUETOOTH®-ENABLED DEVICES SUCH AS MOBILE PHONES, PDAS & LAPTOPS; FEATURES VOLUME ADJUSTMENT; UP TO 120 HOURS STANDBY TIME; UP TO 5 HOURS TALK TIME; DUAL COLOR LED DISPLAYS CHARGE, END OF CHARGE, LOW BATTERY & STANDBY COMMUNICATION; INCLUDES NECK STRAP WITH QUICK-RELEASE FEATURE; HEADSET ONLY