1＞【STRONG COMPATIBILITY】 Portable CD player designed to play CD, it supports most of the format such as CD, CD - R, CD - RW, MP3 and WMA audio files from CD, support AUX connection with all other audible devices via 3.5mm audio input. 2＞【ANTI-SKIP SHOCKPROOF PROTECTION】 Portable CD player withstands your on-the-go lifestyle, 45 seconds anti-skip protection for CDs, 120 seconds anti-skip protection for MP3 CDs, so you never need worry about your music is interrupted. 3＞【MAIN FUNCTION】 Personal CD player offers all the standard playback features you would expect, including skip forward/back, play/pause, keylock, electronic skip protection, anti-shock, 5 sound effects, 4 playback modes, LCD display. 4＞【HOLD FUNCTION】Key buttons protected while listening by the the “HOLD”switch on back side. When the “HOLD” switch is at the on side, then it wont have any influence for your listening when you press any buttons of the discman. Key protection will be canceled when the “ HOLD” switch is at the off side. Please note this when you get our mini CD player, please check the “HOLD” switch is at which side. 5＞【PERFECT GIFT】 Great choice as a Christmas gift for expectant mother, student, elders, good friends etc. It is the best choice for prenatal training, language learning etc. With compact palm size, you can enjoy music at anytime and anywhere. Specification: Playable disc type: CD, CD-R, CD-RW Playable format: CD-DA, MP3, WMA Suitable for 12cm and 8cm CD: yes ASP: CD: 45s, MP3 disk: 120s Frequency response: 20 - 2000Hz sampling frequency: 8 - 48KHz Headphone cable length: 1.05m Power Supply Ways：USB Cable or battery AC / DC adapter input: 100 - 240V, 50 / 60Hz, 0.2A ( Max ), output: 4.5V / 0.6A( not included ) Battery: 2 x 1.5V battery ( not included ) Dimension:14.2*14.2*2.5cm Weight:200g An Assistant for Listening English :Learning a foreign language requires repeated practice, A-B repeat function can let child grasp the words Music Starting from Prenatal Education: 100 thousand pregnant mothers choice, away from the radiation,perfect for fetal education tool Package Contents: 1 x CD Player 1 x Headphone 1 x USB Cable 1 x User Manual Attention: 1. Please turn off the ""hold"" key at the back of the CD before powering it on. Press the power button to star playing the CD. 2. The keys on the device are locked and LCD will display ""HOLD"", then disappear. May be misunderstood machine can not boot. 3. "DISC" will appear on the screen if invalid CD inserted. Please replace the CD disc in the supported format. If the disc format is supported, please try restarting the player. 4. The condition of the disc (scratches, debris, cracks, ect.) will impact the performance of the device. (Only support CD disc) 5. The player has not built in a speaker, you need to connect headphones to hear the sound. 6. sudden exposure to high level music may result in hearing loss. The cd player is designed with a default volume when turned on to offer ear protection. Long press the ear button for 3 seconds, the LED display will show “HIGH”, then release the button and press again to increase the volume.