Bluetooth Supports Auxiliary Cable, USB Port, TF/Micro SD slot & FM radio Bluetooth Version: 2.1 Support A2DP and AVRCP Profile Bluetooth Range: up to 10 meters Speaker: Size - 4 inches, Output - 12W Connections: USB Port, TF/Micro SD slot supporting up to 32GB, Aux-in 3.5mm jack Power Supply: Built-in rechargeable lithium battery 1500mAh (2 hours playtime with max volume) Recharge Power: DC 5V 1A (USB-to-micro USB charging cable included) Product Size: 136 x 254mm What's in the box 1 X Volkano Tornado Heavy Bass Bluetooth Speaker