Battery: built-in lithium-ion battery 3.7V, 300mAh.

Power adapter input: AC100 ~ 240V50/60Hz 0.15A

Output of power adapter: DC5V= = =300mAh.

Data transmission interface: USB2.0 interface, high speed.

Speaker: 4Ω, 1W Music format: MP3

Weight: about 56.4 grams

Operating temperature: 0 to 45 degrees Celsius