The CiDoss mini 4in1 features a very strong Bluetooth 3.0 Connection as well as easy Bluetooth connection works with all Bluetooth-enabled devices: smart phones, pads, laptops and desktops, mp3 & DVD players, supports TF card play etc.; 3.5Mm audio jack for non-Bluetooth devices. Small speaker, big sound The sdh-201 ultra-portable Bluetooth wireless speaker is dual powerful stereo speakers with built-in microphone support any Bluetooth enabled devices - pure music, perfect to enjoy, high-fidelity soundand stereo speakers, built-in Resonance radiator device equipped achieve a more shocking extremely super bass effect. Music on-the-go The CiDoss mini 4in1 is so small it easily slips into a backpack or purse without looking or feeling bulky. The rectangular appearance makes the sdh-201 easy to hold and protects it from impacts, it is one of the most portable speakers available. Chat it up If a call comes through during a music-session, the music is instantly paused to allow for the conversation; as soon as the conversation is over, the portable Bluetooth speaker brings the music back to life. Specifications Lithium-ion battery Bluetooth protocol: version 3.0 + EDR Bluetooth range: 33ft Input sensitivity: 300 mw Rated power: 3w FM Input ports: micro USB , 3.5Mm aux port Play time: 4-10hours Charging time: 3-5hours Weight: 12oz FM radio function Dimensions: 6.7 X 2.36 X 1.77 Inch Package contents 1x bekhic mini 4in1 portable Bluetooth speaker (black) 1x USB charging cable 1x 3.5Mm audio cable 1x user's manual .