🏷️ Basic Information Identification Make: Kenwood Model: KDC-BT40U / KDC-BT645U / KDC-U546BT Product Type: Car Stereo Receiver Generation: Not Applicable (Aftermarket Car Audio) 📋 Manual Details Documentation Manual Type: Service Manual Language: English Format: PDF Downloadable: Yes ⚙️ Engine Specifications Not Applicable Engine Type: Not Applicable (Automotive Accessory) 🔧 Transmission Not Applicable Type: Not Applicable (Automotive Accessory) 📐 Dimensions Physical Width: Single DIN 🔧 Maintenance Not Applicable Service Interval: Not Applicable (Electronic Device) 📄 Audio Features Sound Preamp Voltage: 2.5V Equalizer: 2-Way Graphic EQ (13 Bands) Source Unit: Digital Media Receiver 📄 Connectivity Bluetooth Bluetooth Version: 2.1 + EDR Bluetooth Profiles: HFP 1.5, A2DP, AVRCP Usb Usb Port: Front USB Usb Playback Formats: MP3, WMA, AAC Aux Auxiliary Input: Front 3.5mm Jack 📄 Power Output Max Power Output: 50W x 4 Rms Power Output: 22W x 4 📄 Display Screen Display Type: LCD Display Colors: Variable Color 📄 Controls Interface Rotary Encoder: Yes 📄 Disc Compatibility Formats Cd Text: Yes Cd R Rw Compatibility: Yes 📄 Radio Tuner Tuner Type: AM/FM Preset Stations: 18 FM / 6 AM Radio Data System: RDS