Lithium-ion rechargeable battery 1200mAh.
In the use of a charger or a USB charging adapter.
A large amount of lithium has a large time for bacteria to reproduce.
TF/MMC of direct Mp3 decoder.
Compatible with different types of audio.
Power:5W x 2
Frequency Response : 150Hz-18KHz
Signal to noise ratio : 80dB.
Product size: 17cm x 40cm.