Features:

Operating voltage: 3.7V 600mA lithium battery or 5V USB power supply Chip: GPD2846A Chip footprint:SOP16 PCB Size: 1.3 inches (34.23 mm) x 0.9 inches (22.33 mm) x 0.04 inches (1 mm). 2W mixed mono With power supply, it can automatically play LED indicator included. Support playback of MP3 format Support USB audio mode Support 3 kinds of FM radio chips: RDA5807, BK1080 and RTC6207E Does not support IR remote control. Does not support USB device mode.