Model:SX-3100A. Working voltage/current: DC 5V/min 1A. Outline dimension: 5.8inch (L) x 5.7inch (W) x 1.5inch (H). Weight: About 1.21 lbs (550g). Operating temperature range:-10°F to 158°F (-10°C to 70°C). Disc adaptability:ø12CM. External interface:USB2.0/TYPE-C. Disk loading method: Roller suction type. Use the placement Angle: Horizontal direction, with the disc opening facing upwards Safety Precautions: Do Not Invert: Inverting with a disc inside may affect reading and shock resistance. No Disassembly: Professionally assembled-do not disassemble or adjust. Voltage Range: Input must be 4.75V~5.25V(rated 5V). Storage: Avoid high temperature, humidity, or dusty environments. Handling: Avoid pressure to prevent deformation. Disc Operation: Do not force a second disc while one is loaded. Shock Protection: Avoid drops or impacts. Operating Instructions: 1.1 USB-CD Mode Playback 1. Connect to the car stereo's USB signal port (not charging port). 2. Insert CD, wait ~ 12 sec for reading. 3. Enter "Music" menu, select USB icon (Icons vary across models). 4. Select tracks; playback can be controlled via steering wheel/screen. Normal Status : If PC detects audio files, the device is functional. CD Player Frequently Asked Questions 1. Supported Disc Formats Compatible Formats: Standard CD,HQ-CD,MQA-CD,CD-R,CD-RW,MP3 2. Car Compatibility Check Requires ONE of the following: Car stereo has a USB data port (not just charging) AND supports WAV file playback; 3. How to Connect to Car Method: USB Wired Connection A. Use a USB cable to connect the player to the car's USB data port (not charging port). B. Plug-and-play - no setup required. 4. USB Connection Not Working? Troubleshooting: A. Ensure the car's USB port is a data transfer port (test with other devices if unsure). Color: Black Material: plastic Package Contents: 1 * External Car CD Player Only the above package