Note : Moondrop UltraSonic True Wireless TWS Earphones Earbuds Ultra Sonic Garansi Resmi 1 Tahun In order to fully restore the broadband signal, Ultrasonic utilizes the LDAC high-definition audio transmission protocol. And it #39;s equipped with a newly-developed FRA direct-radiation balanced armature driver, and a 13mm full-frequency dynamic driver. The FRA balanced armature driver uses direct radiation from the diaphragm to handle high-frequency sound waves, thus reducing the standing wave generated by the sound nozzle structure of traditional balanced armature units, and delivering a wider ultra-high-frequency response, in terms of the 13mm full-frequency sapphire-coated dome composite diaphragm dynamic driver, it handles the bass/mid-range and enhance sound reproduction in the relevant frequency bands. To transmit high-resolution music files, Ultrasonic supports the widely used LDAC high-definition lossless audio transmission protocol, which can transmit 24 bits/96 kHz at bit rates as high as 990kbps, amply meeting the dynamic range and broadband requirements of the hardware. The LC3 encoding and decoding protocol supporting the new generation Bluetooth LE Audio, when paired with devices that are also compatible with standard LC3, achieves not only much lower latency than traditional Bluetooth but also excellent high-fidelity signal transmission. Product Information Model: MOONDROP Ultrasonic Bluetooth version: 5.3 Supported protocols: A2DP/AVRCP/HFP/HSP/SBC/AAC/LC3/LDAC Charging port: Type-C Working distance: 10m (barrier-free open environment) Support system: Bluetooth devices and mobile phones Earphone charging time: about 1 hour Charging time of charging case: about 1.5 hours Earphone battery capacity: 3.7V/37mAh Battery capacity of charging case: 3.7V/380mAh Battery life of earphone: about 6 hours Battery life of charging case: about 18 hours Package List Ultrasonic, charging cable, ear-tips, protective case, manual, service card, certificate, prompt card