Bluetooth Earphones [Exclusively for Sports! First in the Industry in 2025!] Earaku Wireless Earphones for Sports, SoundFold J135, Powerful Bass, Ideal for Sports, Running, Outdoor Activities, Gym, Ultimate Fit, Bluetooth 5.4, 23 Hours of Playback, Ear-hook Style, Ultra-Lightweight 34g, Open-Ear, No Sound Leakage, Comfortable Fit/Multipoint Connection/Dedicated to Exercise Brand: Cosyliber Color: Black Ear Placement: Open-Ear Headphone Type: Open-Ear Noise Control: None Model Name: J135 "Designed Exclusively for Sports × Doesn't Slip Off Easily" - Earaku's uniquely developed open-ear earphones "SoundFold J135" feature a cutting-edge 3D fit design with an ultra-flexible silicone neckband and two ear-hook points, providing maximum stability through a three-point support system based on ergonomics, ensuring they stay in place even during running or weight training. "Overwhelming Sound Quality × Immersive Listening Experience" - These wireless earphones are equipped with extra-large 27mm drivers, approximately twice the size of comparable sports earphones in the industry, expanding the soundstage by 4.3 times. "Excellent Sweat Resistance and Durability" - Did you know that the salt and oil in sweat can penetrate the inside of earphones and cause malfunctions? To achieve true sports earphones, Earaku has adopted high-density nano-coating technology and reinforced UV resin, conducting a continuous 62-hour salt spray test, exceeding industry standards. "23 Hours of Continuous Playback & Low-Latency Wireless" - Don't stop exercising, don't stop the music! This open-ear headset has a built-in 250mAh large-capacity battery and can be fully charged in about 2.5 hours. "Can Connect to Two Devices Simultaneously" - These open-ear headphones support multipoint, allowing simultaneous connection/standby to two devices such as a PC and a smartphone.