LG Electronics HBM-905 Tri-Mic Bluetooth Headset - Retail Packaging - Graphite/Silver Tri-Mic Audio enhances The Noise Reduction and Echo Cancellation functions HD Audio proivdes Crystal Clear Streaming Audio including Music, GPS Navigation and More Text Message reading through LG's BT reader Application for Android OS Name Alert Announces the caller ID for Incoming Calls 4.5 Hours Talk Time, 9.5 Days Standby Time Sleekly designed mono Bluetooth headset for calls and A2DP audio streaming of music and GPS navigation directions Tri-mic audio picks up voice signals and separates them from background noise Noise suppression reduces background noise; echo cancellation Free BT Reader app (Android OS) reads your incoming text messages in real time Up to 4.5 hours of talk time and over 9 days of standby time