【Upgraded Bluetooth-compatible 5.4】Equipped with the latest Bluetooth-compatible 5.4 chip, these wireless earbuds offer faster pairing, lower latency, and a more stable connection. 【Ergonomic Ear-Hook Design】The flexible ear-hooks provide a secure, comfortable fit even during intense workouts or outdoor runs. 【High-Sensitivity Dual Magnetic Diaphragm】Equipped with Dolby-level panoramic sound technology for an immersive audio experience. 【Crystal Clear Calls】Enhanced call quality ensures your voice comes through loud and clear in any environment. 【Reduced Sound Leakage】Enjoy your audio privately with minimal sound escaping to disturb others around you. Specifications: Product model: LX-90 Bluetooth-compatible solution: Bluetrum 5636C+5682B Bluetooth-compatible version: Bluetooth-compatible V5.4 Bluetooth-compatible pairing name: LX-90 Bluetooth protocol: HFP, A2DP, HSP, AVRCP Working frequency: 2.402GHz-2.480GHz Bluetooth-compatible audio decoding: AAC, SBC Bluetooth-compatible transmission radius: open and obstacle-free distance ≥10 meters Bluetooth-compatible compatible devices: Bluetooth-compatible 2.0 or above + BR+EDR Connection method: After opening the cover of the charging case and taking out the earphones and turning on automatically, enter the pairing mode, and the mobile phone searches for the Bluetooth-compatible earphones to pair and connect One-to-two function: not supported (but 2 earphones can be used separately to connect 2 mobile phones separately to control their respective mobile phones) Hall switch: yes Supported channels: dual stereo channels Prompt tone language: Chinese and English Noise reduction type: yes Noise reduction depth: no Earbud battery: lithium-ion polymer battery 500815/40mAh/3.7V Charging case battery: lithium-ion polymer battery 604030/600mAh/3.7V Display screen size: 2.42 inches Battery life: Single ear (connected to mobile phone Bluetooth-compatible): music time: about 4-5 hours, talk time: about 4-5 hours Number of times the charging case charges the earphone: 5-6 times (earphones*2) Earbud charging method: thimble contact type Charging case charging method: Type-c interface Earbud full charge time: about 1.5 hours Charging case full charge time: about 1.5 hours Headphone speaker: Size: 12mm Material: composite film dynamic speaker Impedance: 32Ω Sensitivity: 127.6±3dB Standard power: 5mW Maximum power: 10mW Frequency range: 20HZ-20KHZ Microphone: Size: 2.75*1.85*0.95mm Type: Analog silicon microphone Sensitivity: -42±3dB Directivity: Omnidirectional Signal-to-noise ratio: 58dB Maximum input sound pressure: 123dB Package included 2 x Earphones 1 x Charging Case 1 x Charging Cable 1 x English User Manual Other items not include Specifications Brand N/A Color Black Packaging Type Colored Box Plug Type (For Supply) N/A User Manual (Language) English Gross Weight 0.134kg Volume Weight 0.127kg Package Length 10.800cm Package Width 4.400cm Package Height 11.900cm