Bluetooth 5.4 Wireless Earphones Neck Style Long Range HiFi Surround Sound With Card Insertion And Ear Return Bluetooth Earphones Features: Large capacity battery: Built in 3800mAh large capacity lithium battery, using low power technology, fast charging within 1.5 hours, standby time of 200 hours,providing long lasting battery life. Clear sound quality: Equipped with Bluetooth 5.4, HIFI sound quality, graphene diaphragm, the sound is smoother and clearer, and physical noise reduction effectively reduces the occurrence of other sounds. Comfortable to wear: Designed with a memory neck, it can be bent, automatically guided to recover, and adjusted at any for a more comfortable wearing experience. Advanced Bluetooth 5.4 & Noise Isolation Technology: Experience stable connections and clear calls with the latest Bluetooth technology and enhanced noise filtering, effectively minimizing background distractions for uninterrupted communication. HiFi sound unit: Equipped with a high-definition sound unit, it can listen to music details more clearly. The high notes are clear, the middle notes are soft and full, and the low notes is elastic. Product Description: Product Name: Sports Neck Hanging Earphones Product colors: Black Bluetooth version: V5.4 Transmission distance: 20m Battery capacity: 3500mAh Charging time: 1.5 hour Product size:17×12cm/6.69×4.72in Product weight:30g/0.066lb Package size:18×13×3cm/7.09×5.12×1.18in Package weight:70g/0.154lb Product List: 1 x instruction manual 1 x headphones 1 x charging cable