Fiio S1 portable mini speaker

S1 is a portable mini speaker that is the best option for
MP3/MP4/mobile phone/laptop, design with a USB all-purpose
interface, and it can recharge via the computer and also can be
used as a loudspeaker.

Main Feature:
Built-in automatic gain control circuit to prevent effectively the distortion
and scratchy sound.
All in one jack can do completely for power supply, charging, audio connection.
Perfect in protective circuit: signal impact protection; Battery over charge
protection; Low electric discharge battery protection.
Built-in the new model of digital amplifier IC, with low distortion, low noise,
and high efficiency.
Unique L/R circuit, single speaker playback but not lost track of any information.
Built-in rechargeable Lithium-Polymer battery, it can use constantly for 6 hours
fter charging full time (100 minutes).
3 color lights; clear working instruction, charging state .
Compact size, can carry out, easy to carry.

Main specification:
Output Power: 2.2W
Frequency Range: 50Hz~10KHz
USB charging : DC 5V 500mAMax
Power Supply : built-in rechargeable lithium battery
Size : 75mmx75mmx24mm
Weight: 70g