Specifications Model:Lenovo Erazer XT90 PRO BT version: 5.4 Charging port: Type-C Communication distance: 10m (without obstacles) Compatible system: IOS / ANDROID / WINDOWS Working time: about 4.5 hours after full charging. The charging case can provide 20 hours of power to the earphones. Headphone capacity: 30mAh Charging box capacity: 300mAh [Ear measurementcustomization] Comfortable to wear for a long time, a good companion for work and life. [Titanium plated dynamic coil] Polymer composite titanium plated diaphragm, 13mm dynamic coilunit with delicate high pitched sound and abundant low pitched sound. [Bluetooth 5.4] Bluetooth 5,4 chip signifcantly improves transmission speed and performance. [IPX5 level protectionDesign with seamless seams] With lP55 waterproof certifcation, sweat and rain can behandled with ease, ensuring full protectionthroughout the process. [13mm large-sized unit] The built-in 13 mm PET diaphragm dynamic coil unitprovides strong analysis, and can present rich sounddetails even in loud felds,greatly enhancingthe music atmosphere. [Low game latency[ Game sound and graphics are more synchronized, allowingyou to react faster and faster. Products Include 1 * A pair of wireless earplugs 1 *Charging box 1 *Charging cable