Features:
Bluetooth connection playback
Bidirectional handsfree calls
The Bluetooth is connected by a key
Micro SD music player
USB sound card, card reader
Support for less than 32GB Micro SD card lossless music playback, and data storage
APP smart play, wireless card reader, alarm set Speaker unit 1.5 inch + passive radiator
Output power 4Ω 3W x 2 THD = 10%
The frequency response is 60 Hz to 20 kHz
Wireless connection to Bluetooth 4.2
USB specification USB2.0, compatible with USB1.1
File format APE, MP3, WMA, WAV, FLAC