We discount for large quantity. Welcome to contact with us Bluetooth o function, necessary for listening to music Microphone function: After Bluetooth connection, open the singing APP and sing your singing anytime and anywhere. Can be used for conference hosting, friends gathering, stage performance Ear return function, can link to external high-power equipment to amplify sound effects Cute cartoon design, new ABS and silicone environmentally friendly materials, high-quality display Product Name: microphone Model: K9 Material:ABS+silicone colour:blue Package Contents: 1 * microphone 1 * Chinese and English manual 1 * charging cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.