Power supply: built in lithium 
batteryFunction: Bluetooth connection, plug-in connection card radio call 
functionPackage Type: Official 
StandardSize: 135x53x36mm
Duration: 30 hoursSupport 
APP: noConnection: wireless radio, card player USB Bluetooth card reader
Weight: 200gColor 
classification: black
Bluetooth version: 4.0Shell 
material: aluminum alloy
Support format: Bluetooth player U disk TF card
Receiving distance: 10m and above
Speaker adjustment: Keys
Brand: BAIDISAI
Model: A1103