This product features Bluetooth, allowing you to play music from smartphones and other Bluetooth devices. In addition to CD playback, this product also has an AUX function, enabling you to connect it to external audio devices like a car via the included AUX cable. It can be powered by a mobile battery and also includes an FM radio function (frequency: 76KHz-90MHz), making it practical as a disaster-prevention radio in emergencies. Furthermore, you can easily select from five modes: Bluetooth mode, CD mode, FM mode, USB mode, and AUX mode using the "MODE" button on the main unit or the remote control. Important Notes! Important Notes! Important Notes! 1. When a compatible USB memory card is inserted in CD mode, the product will automatically read the USB memory card and play music. 2. This product supports FAT16/FAT32 USB memory cards. It does not support NTFS. Please be aware of this. "Desktop CD Player with Transparent Dust Cover" The CD player with a transparent dust cover prevents dirt and dust from adhering to the disc surface during CD playback, effectively protecting the CD. The bottom features an original wide-base design, allowing it to be placed securely on a tabletop. It has a memory playback function, so when you play a CD again, it starts from the previous stop position, eliminating the need to start from the beginning. "Built-in High-Quality Speakers & 3.5mm Headphone Jack" This CD player has built-in Hi-Fi high-quality speakers that can play three-dimensional music, delivering clear sound without distortion even at low or high frequencies, making it perfect for everyday use. It also has a 3.5mm headphone jack, allowing you to enjoy private listening with separately sold 3.5mm headphones. Note: 1. Always lower the volume before connecting headphones to the player. 2. The speakers will be turned OFF when headphones are connected. "Easy Operation & Suitable for Various Locations" You can power on/off simply by sliding the power button on the right side (the product plug is PSE certified, so you can use it with confidence). Purchased about a year ago and only listened to CDs once. Operation confirmed. Batteries are not included in the remote control. Instant purchase OK. No box included.