1. Portable CD player: HOTT CD903TF portable CD player with built-in shockproof protection. / Compatibility: CD, MP3, CD-RW, CD-R and WMA. / DIR: only for mp3 discs / 5 sound effects: BBS, pop, jazz, rock, classic. / 5 play modes: play in order, repeat track, repeat all, play the first 10 files of the file, play in random order. 2.V5.0 Bluetooth and FM Transmitter: HOTT Portable CD Player CD903TF provides Bluetooth and FM connectivity and can be easily paired with headphones, speakers, radios, cars and some smartphones (plug in the headphones as an antenna). Additionally, it can be paired with multiple FM receivers at the same time. 3. Rechargeable battery: HOTT Bluetooth portable CD player CD903TF has a built-in 1800mAh lithium battery, which can provide 9 hours of power at medium volume after 3-4 hours of full charging. Charging with USB cable, portable and convenient. 4. Touch Buttons and Backlit Display: The HOTT CD903TF rechargeable CD player is designed with responsive touch buttons and a backlit display, making it perfect for nighttime use.