3 USB 2.0 Port – It supports USB 2.0’s high-speed and full-speed functions. SD Card Slot – It supports SD and MMC cards. Battery – Built-in rechargeable Li-polymer battery is durable. Video file conversion - the accessory software can convert any unreadable fileformats into readable ones. Multiple languages - It supports multi-languages, such as English, German,French, Italian, Dutch, Spanish and Russian. Firmware upgradation - The firmware can be upgraded.2 Quick Tour of Acer MP3403 Pack and AccessoriesPlease be sure that the pack and accessories include the following pieces:; Acer MP340 player; User’s manual; Installing CD; Power adapter; A Line-in cord; USB cable; Stereo earphone4 Charging the Batteries1) This device has the built-in Li battery and the user can charge the battery by usingthe accessory charger. No matter turning on or off, the battery will be chargingwhen the charger connects it to the live power.2) If the battery indicator shows one grid or no grid, it means lacking the power andcharging is needed.3) In order to last the battery life, it is recommended to discharge the batterycompletely before charging during the first two times of charging.