Specifications: General: Product type: Full metal K song microphone pickup: Capacitive Bluetooth 3.0 output power: 3w frequency range: 100hz to 10khz maximum SPL: About 115db 1khz THD: Up to 1% reverb mode: Echo sound reverberation power supply: Built-in lithium battery, battery capacity: 2600 mah battery working time: 3 to 5 charging power: DC 5v phone support: Supports connecting to android, apple systems. With the app, you can experience the effects ktv karaoke rooms and functions some question's about q7 about product quality we provide 2 years warranty. If the product have any quality issues, we definitely will make a replace or refund according to your request if mic volume is too small, please adjust volume and music to maximum or try to change q7 microphone angle. If you use mic k songs in a rather small room, its volume will be greater. About the q7 microphone versions the q7 microphone has two versions, Chinese version and English version. Our microphone is English version, the bottom of English version hasn't USB interface. About iPad app issue, some k song app 's KTV mode on the iPad, the voice/music output is the iPad, not the q7. Because some iPad app 's KTV mode, which is equal to recording mode. In order to ensure sound quality , recording mode need to use wire to connection mic. Please try other K song app. Mobile phone app is not the problem. If there are any other problems please contact us thank you.