ONIKUMA T209 Music Earphones Ear Hook Wireless Earbuds Bluetooth-Compatible Headphones for Outdoor Sports 【Advanced Bluetooth-compatible 5.4】Experience stable and efficient wireless connectivity with the latest Bluetooth-compatible 5.4 technology,ensuring seamless audio transmission. 【High-Quality Sound】Equipped with 16MM driver units,these earbuds deliver rich,clear audio across a wide frequency range of 20Hz-20KHz. 【Comfortable Ear-Hook Design】The ergonomic ear-hook design ensures a secure and comfortable fit,perfect for long listening sessions or active use. 【Versatile Compatibility】Supporting multiple Bluetooth-compatible protocols including A2DP,AVRCP,HFP,HSP,SPP,and HID,these earbuds offer broad device compatibility. 【Quick Charging】Benefit from fast charging capabilities with a Type-C port,fully charging the earbuds in just 2 hours. Specifications: Model: T209 Chipset: AB5656C Bluetooth-compatible version: 5.4 Material: ABS Supported protocols: A2DP 1.3/AVRCP 1.5/HFP 1.5/HSP 1.2/SPP 1.2.4/HID 1.0.14 Decoding format: AAC SBC Bluetooth-compatible transmission frequency: 2.402-2.480GHz Bluetooth-compatible range: 15 meters Charging case battery capacity: 300mAh Headphone battery capacity: 70mAh Charging compartment: can be charged 3 times Charging time for earphones: 2 hours Charging time for charging case: 2 hours Working time: about 6 hours Driver unit: 16mm Impedance: 16Ω±10% Sensitivity: 115±3Db Frequency response range: 20HZ-20KHZ Charging interface: TYPE-C Package included: 2 x Earphones 1 x Charging Case 1 x Charging Cable 1 x English and Chinese User Manual Other items not include