1. Loud and clear calls: The sound from this durable car hands-free device is loud and clear thanks to high output volume and advanced noise reduction technology. 2. Superior voice input: HD voice microphone and Bluetooth V4.1 + EDR technology accurately capture human voice, providing fast and clear voice transmission. Your voice will be heard clearly without delay. 3. Noise cancellation field: Curved surface with 574 dense holes enhances sound clarity through echo cancellation. Makes the other party's voice softer and clearer. 4. Long battery life: A road trip-ready battery provides up to 25 hours of talk time and 450 hours of standby. The car Bluetooth hands-free device keeps you connected for all important calls, even on long journeys. 5. Easy setup and operation: Pair the Bluetooth device with your mobile phone and mount it to your vehicles sun visor in seconds. Simple to use with a large button a key feature for SAFE driving.