Vakoss TC-B439K FM transmitter 87.5 - 108 MHz Bluetooth/USB Black

Volume control: Buttons Case colour: Black MP3 playback: Yes Audio formats supported: WAV USB direct playback: Yes Hands-free calling: Yes Product colour: Black Memory card reader microSD Memory card reader: Yes Backlight colour: RGB USB ports quantity: 2 Hands-free calling: Yes Output current: 3.1 A Power source type: DC DC input voltage: 12 -24 V Output voltage: 5 V Depth: 49 mm Width: 83 mm Height: 48 mm Weight: 30 g Built-in display: Yes Display: LED Maximum USB flash drive size: 32 GB Maximum memory card size: 32 GB Compatible memory cards: MicroSD (TransFlash) Card reader integrated: Yes Bluetooth: Yes USB 2.0 ports quantity: 1 Bluetooth functions: Handsfree calling Device interface: Bluetooth/USB FM band range: 87.5 - 108 MHz