This A2 mini Wireless Bluetooth Speaker is built with 280 hz- 16 KHZ frequency response. 95 db noise ratio and here is also added DC 5 V voltage with Bluetooth 4.2 version. This Bluetooth speaker covers up to 10m working distance and with full charge you can use it 2 to 3 hours. This stylish Bluetooth speaker supports phone/laptop/tablet PC,support U Disk/TF Card(mini micro Card). It connect a row of mini speakers to get jaw-dropping audio performance. In this speaker, it’s larger 45 mm driver delivers precise high for superb sound.