1. Portable CD Player: HOTT CD903TF Portable CD Player with built-in shock protection. / Compatibility: CD, MP3, CD-RW, CD-R and WMA. / DIR: for mp3 discs only / 5 sound effects: BBS, Pop, Jazz, Rock, Classic. / 5 play modes: Play in sequence, Repeat tracks, Repeat all, Play first 10 files of files, Play in random order. 2.V5.0 Bluetooth and FM Transmitter: The HOTT Portable CD Player CD903TF provides Bluetooth and FM connectivity and can be easily paired with headphones, speakers, radios, cars and some smartphones (plug the headphones as an antenna). Also, it can be paired with multiple FM receivers at the same time. 3. Rechargeable battery: HOTT Bluetooth Portable CD Player CD903TF with built-in 1800mAh Li-battery can provide 9 hours power at medium volume after 3-4 hours full charge. Use the USB cable to charge, portable and convenient. 4. Touch buttons and backlit display: HOTT CD903TF rechargeable CD player is the latest design with sensitive touch buttons and backlit display, which is perfect for nighttime use.