Description:Type: P9 HeadphoneTransmission distance: 5-10mBattery capacity: 400mAhSensitivity: 105 ± 3dbSpeaker diameter: 40mmPlaying time: about 4-5hStandby time: about 24hCharging time: about 2hBuilt-in microphone: YesSupport TF cardCharging port: USBSong switching: supported (short press the function key)Volume adjustment: support (long press the function key)Answer the call / hang up the call: support (short press the function key)Audio I / O interface: supportedSpecifications:1.Use ultra-thin smart casing to save in ultra-low power consumption mode2.Active noise reduction can block external noise, allowing you to immerse yourself in music3.Transparent mode for listening and interacting with the world around you4.Spatial audio dynamic head tracking provides cinema-like sound surrounds you5.Compute audio combines custom acoustic design with Apple H1 chip and software to bring a breakthrough listening experience6.Designed with knitted mesh mask and memory foam ear pads, it fits perfectly7.Easy setup, head detection and seamless switching between devices bring a magical experience8.Active noise reduction and spatial audio support, 20 hours of listening, watching movies or talking time9.Waterproof design:Prevent sweat and dust from damaging parts (swimming, washing and soaking are not supported)Package Included:1 x Headphone1 x Instruction1 x Micro USB Charging CableNotes:1.Due to the difference between different monitors, the picture may not reflect the actual color of the item.2.Please allow slight measurement deviation caused by manual measurement, thank you for your understanding.