Volume adjustable shoulder speaker mic; you can rise up and down the sound according you need; Up to 1W output power is surely will keep your voice hear and be heard clearly The impact resistant shell can withstand unexpected impact and still work normally; the compact design and soft and tight rubber side can effectively block dust and have certain water resistance Shoulder speaker microphone with detachable lithium battery and USB charging interface gives it more options in charging mode The 360 rotating clamp can rotate in any direction making it easier to use;and its flexibility also avoids the back clamp breaking phenomenon caused by rotation The included 3.5mm headphone connector makes your calls smoother and more private without holding your radio speaker mic in real time.