BT version: 4.2. Functions: Tracks control, Hands-Free calling & volume control. Playing/Connectivity modes: BT, microSD card, 3.5mm & FM radio. LED blue light. Stylish metallic body. Output power (W): 3. Battery: Lithium-Ion 400 mAh. Charging time (hrs): 3. Playing time (hrs): 2. Driver diameter (mm): 40. Frequency range (Hz): 20 20K. Impedance (Ohm): 4. Signal to noise ratio (dB): 80. Dual Cable USB to micro USB for charging / 3.5mm for audio input included. USB is only for charging, 3.5mm allows you to connect to your devices. Dimensions (in): 1.7 x 2.75 x 2.75. Weight (oz): 4.5.