With the transmitter (Bluetooth/FM) from Carpoint you can stream audio and make telephone calls wirelessly via the car's FM stereo system. It automatically switches from music to hands-free when there is an incoming call. It comes with a high-quality noise canceling microphone for optimal communication and number redial for the last phone number. A clearly readable LCD screen and battery voltage display when switched on make use easy. You can easily answer/transfer/cancel or end a call with the push of a button. The transmitter is equipped with 1 standard USB port (5V/1A) and 1 USB port with Quick Charge charging (5V/3A, 9V/2A, 12V/1.5A). Wireless version: ATS V5.0 Support agreement: A2DP, AVRCP, HFP, HSP Frequency range: 87.5-108.0MHz FM transmission distance: 3m Input: DC 12-24V Output: QC3.0 fast charging Music format: MP3, WMA, WAV USB maximum capacity: 64GB Low power warning: flashes under 12V Material: ABS+ high-end anodic aluminum oxide Bluetooth frequency 2.4-2.483 GHz