More details from the review video as followed:



More Details:
Xiaomi Black Bluetooth Speaker
XIAOMI Bluetooth Speaker





Specifications:

Basic Specification
 Brand Name  Xiaomi
 Compatible With  Most of Bluetooth mobile phone
 Bluetooth Version  4.0
 Effective Distance   10m
 Frequency Range  2.4GHz~2.48GHz
 Frequency Response  100Hz~20KHz
 Suport Audio Protocol  A2DP， AVRCP， HFP
 Outpot Power  1.8W X 2
 Music Playback Time  About 10 hours
 Impedance  4Ω
 Size  154.5 x 62 x 25.3mm
 Color   Black
Package Included: 
1 X Bluetooth Speaker
1 X Manual