Features: Thin and invisible, you can wear it comfortably even when lying on your side: The body is designed to be thin and light, with a thickness of only 1CM. People who like to lie on their side can also wear it to enjoy the beauty of music. Large-capacity charging compartment and ultra-long battery life: Equipped with a 5.3 chip, it has lower power consumption and long battery life, so you can say goodbye to frequent charging, and enjoy music without worries. Intelligent noise reduction, clearer voice calls: Adopting a new voice noise reduction technology, it effectively solves the interference of environmental noise during calls, and the 10mm speaker provides a strong and wide sound range, which greatly improves the call quality. Fast and more stable transmission: The powerful Bluetooth 5.3 chip has stronger anti-interference, faster and more stable transmission. Switch between single and double ears at will: Independent dual hosts, breaking the master-slave restrictions of traditional wireless headphones, you can use whichever one you want, dual hosts and dual channels, and you can quickly reconnect whenever you want. Specifications: Transmission Range: 10 meters Battery Life: 4-8 hours (hours) Material: Plastic Packaging Size: 12.6x9.5x3.7cm Package Contents: 1x Pair X55 Sleep Earbuds 1x Charging Case 1x USB-C Cable 1x manual Please Note: First use: charge fully Optimal for <8hr continuous use