•Bluetooth 5.3 Connection: Ultra-low latency keeps synchronized with audio and video, convenient to keep in contact with your teammates all the time •Immersive Stereo Sound: Adopting powerful driver units, making the bass punchier and midrange full and textured, treble crystal crisp, provides you with stereo surround sound •Waterproof Design: The headsets are protected against damage from sweat and light rain. Perfect for sports and workouts •OWS Ear Hook Wearing: No need to jam the earphones into the ear to better protect the hearing. Unlike in-ear headphones, it allows you to keep in touch and understand the surrounding environment to ensure safety •Compact Size: The compact body fits easily in your pocket, convenient to carry when traveling, cycling, etc Specification: •Bluetooth version: V5.3 AD6973D4 (with amplifier) •Supported protocols: A2DP, HFP, AVRCP •Battery capacity: Earphone: 65mAh * 2 (earphone battery without protection board, earphone board lithium battery protection IC); Charging bin: 400mAh (with protection board) •Charging time: 1.5h •Talk time: 7.5h •Play time: 8.5h •Standby time: 200h •Built-in speaker: •Size: 10*8.5*2mm square speaker •Sensitivity: 119±2dB (800MV 1KHZ) •Impedance: 30Ω ± 15%Ω, at 1KHz •Output power: 21mW •Microphone: •Sensitivity: -42DB ±2 •Impedance: 400Ω •Noise reduction method: single microphone DNS call noise reduction •Input charging standard: DC 5V •Bluetooth operating frequency: 2.402G-2.480G •Frequency response range: 20-20KHz •Maximum transmission distance: 15m •Voice prompt: Supported •Multi-point connection: Not supported •Wearing method: Ear hook •Waterproof level: IPX4 •Charging interface: Type-C Package included: •1 Pair x Earphone •1 x Charging Bin •1 x Charging Cable •1 x English and Chinese User Manual •Other things not included