D-819 Bluetooth 5.3 Headphone HiFi Stereo 15H Playtime Ear Wireless Headsets Support FM - Beige •Advanced Bluetooth5.3 Connectivity: Compatible with all Bluetooth-enabled devices,these headphones utilize advanced Bluetooth 5.3 technology for fast pairing and reliable connectivity •Long lasting battery life,no worry about the battery life: 400mAh high capacity battery,playtime is up to 15 hours,get rid of battery life anxiety •Three Modes Switch: Wireless,wired,Insert Micro SDcard,three modes switch,can use the headphone without power •The audio and Scenes are synchronized to easily dominate the game: Quickly press the play key 4 times and switch to low delay game mode. •Good sound quality that lasts forever: The intersection between music and life is wonderful. Let you pick up your headphones and enjoy beautiful sound quality anytime and anywhere. •Wide Compatibility: Fully compatible with devices that with BT,such as mobile phones,computers,tablets,and PC •Specification: •Bluetooth version: V5.3+EDR •Bluetooth supports data streams: HSP,HFP,AVRCP,A2DP,SDPAAC,SBC. •Bluetooth chip solution: JELI AC6955F chip for true stereo sound •Charging time: about 2 hours •Music playback time: approximately 15 hours (depending on volume and song) •Talk time: approximately 15 hours (depending on volume) •Battery specification: 3.7V/400mAh Class A with dual protection •Effective and stable connection distance: ≥ 20 meters •Support external TF card (micro SD card) insertion •Support FM radio function •Support game mode - normal mode switching •Durable and scalable design •Input voltage/current: 5V/1A •Speaker: 40mm,32 Ω •Audio output power: 22mW •Microphone: Sensitivity -42dB ± 3 •Charging port: Type-C Package included: •1 x Headphone •1 x Charging Cable •1 x Audio Cable •1 x English User Manual