BlueAnt Z9i Bluetooth Headset (Black) [Retail Packaging] # Bluetooth version 2.0, Class 2 # Standby time: 200 hrs # Dimensions: 1.5" (L) x 0.6" (W) x 0.44" (D) # Bluetooth Hands-free (HF) / Headset profile (HSP) supported # # LED indication # Talk time: 5.5 hrs Multiple pairing (max 5 devices) # Echo cancellation # Wind Noise Reduction # Voice Isolation (standard / max settings) # Dual Microphones # Upgraded Automatic Speech Recognition