This is the audio-technica AT-FMR3BT, a Bluetooth-equipped FM transmitter. The instruction manual is also included. You can wirelessly enjoy music from your smartphone or other devices in your car. It's a good product with high-quality sound and stable Bluetooth and FM connections, and I've used it for a long time, but it seems it's already discontinued. I am selling it because I have replaced it with a Bluetooth-compatible car stereo. ■ Supports 141 transmission frequencies, allowing you to freely select a frequency that doesn't interfere. You can use it anywhere in Japan without interference. ■ Wireless playback while charging your smartphone or tablet ■ Adds Bluetooth functionality to your car navigation/audio system ■ You can skip tracks, go back, and play/pause using the buttons and knobs on the main unit without touching your smartphone. ■ Equipped with frequency memory that doesn't require re-setting. ■ Integrated body with adjustable angle to suit the position of the accessory socket ■ Built-in amplifier volume on the main unit for high-quality sound for various content 【Brand】 audio-technica 【Model Number】 AT-FMR3BT 【Functions】 Bluetooth (Multi-pairing for 8 devices) FM transmitter (Selectable in 0.1MHz increments from 76.0MHz to 90.0MHz) USB charging port Type-A x 2 ports (Two types: 2.0A and 1.0A. Please use within the capacity) 3.5mm audio output terminal compatible 【Condition of the product】 No noticeable scratches or stains / With instruction manual / No box 【Color】 Black/Red Please see the 6th photo for detailed technical data. AUDIO-TECHNICA audio-technica AT-FMR3BT RD Bluetooth-equipped FM transmitter RD (Red) H59 x W45 x D98 Brand: audio-technica #オーディオテクニカ #audiotechnica #AUDIOTECHNICA #ATFMR3BT #ATFMR3BT #取扱説明書 #説明書付き #カーステレオ #Bluetooth #FMトランスミッター #高音質 #ワイヤレス接続