... Mini Speaker for campus -Built-in MICRO SD/lithium battery. -Certificate: FCC,CE,ROSH -Easytaking Easytaking Portable Mini Speaker for campus, portable laptop mini speaker, mini ... speaker bq-21 Specification: Connect playing with your mobile, MP3 / MP4 laptops etc digital products, support SD ... amplifier, built-in MICRO SD/lithium battery, decoded play ...