130° Rotation Angle Adjustment Open Ear Design: The open-ear headphones are built around the ear, and can rotate flexibly by 130 ° leaving the inner ear open to ensure long-term wearing comfort. The ergonomic and flexible ear hook offers stable and secure fit for walking, running, and even jumping Combined with the charging case, the battery life is 18 hours: it can be used for 5-6 hours on a single full charge, and the standby time is about 300 hours LED battery level display controls real-time battery level: The LED battery level display provides a clear view of the charging case and headphone battery level, providing a more intuitive understanding of the battery level Sensitive control, touch response: adjust volume to switch songs, answer and hang up calls, fully control operation instructions Experience a new form of wireless listening: 13mm speakers use sound pointing technology to accurately transmit sound into the ear canal, achieving a "no in ear"+"true wireless" listening experience Specification:  Bluetooth-compatible version: V5.3+EDR Bluetooth-compatible chip: JELI AD6983D Bluetooth-compatible frequency range: 2.402-2.480GHz Bluetooth-compatible data stream: A2DP, AVCTP,AVDTP,AVRCP,HFP,SPP Bluetooth-compatible connection distance: about 10-15 meters Music playback/call time: approximately 5-6 hours (long battery life) Adjustable ear hook angle: 130 ° Standby time: approximately 300 hours Support voice assistants (Siri, Google) Headphones Charging time: approximately 1 hour Charging case Charging time: about 2 hours, Type-C port charging Earphone battery: 40mAh Charging compartment battery: 300mAh A-class with protective board Speaker specifications: Diameter: φ 13mm, 32 Ω Strong sound quality Microphone sensitivity: -42dB ± 3 Sound output: approximately 22mW Signal to noise ratio: ≥ 95dB Package included:2 x Earphones1 x Charging Case1 x Type-C Charging Cable1 x English User Manual