Specifications: Name: Xiaomi Square Box Bluetooth speaker 2 Size: 154.5 X 60 X 25.5mm Bluetooth: V4.2 Effective distance: #39; 10m Frequency: 2402MHz-2480MHz Protocol: A2DP,AVRCP,HFP Input: 5V 1A Time for music: about 10 hours (40% of music power) Power Rating: 2.5w X 2 Impedence: 3 Frequency response range: 100Hz-18KHz Upgraded version, Bluetooth 4.2, HD sound, 10Hrs life, portable and light weight. The body is made of aluminum which provides a very premium look. * xiaomi Square Box Bluetooth Speaker 2 High-definition sound quality | lightweight portable | Bluetooth 4.2 | 10 hours to play * Xiaomi square box Bluetooth speaker 2, the sound is more clear and natural, full of sound * Double sound unit, continuation of classic good sound * Xiaomi square box Bluetooth speaker 2 process again upgrade, silver frosted aluminum alloy box,with warm and white white box, * Built-in microphone, support the call function, connect the communication device, when there is a phone call, press the power button can be directly answer and hang up; using CVC hardware noise reduction, providing high-definition sound quality, * Can support 10 hours of life, because the Xiaomi square box Bluetooth speaker 2 built-in polymer lithium battery, battery capacity of 1200mAh, give you more lasting companions. * Add the AUX interface to the Bluetooth 4.2 chip Happy shopping.