Vocalism Principle: Dynamic Control Button: Yes Active Noise-Cancellation: No Function: Sport, For Mobile Phone, Common Headphone, for Video Game Connectors: USB Model Number: F9 Bluetooth Wireless Headphones Codecs: AAC Resistance: 32Ω Frequency Response Range: 20 - 20000Hz With Microphone: Yes Sensitivity: 98dB Support APP: Yes Material:ABS colour:black Package Contents: 2 * Wireless earphones 1 * Charging cable 1 * Charging box 2 * Earmuffs 1 * instruction manual 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.