Invisible Sleep Wireless Earphone Bluetooth 5.3 Headphones Hidden Earbuds The invisible sleep earphone offers a discreet and comfortable design, allowing users to enjoy soothing music or relaxing sounds while sleeping without disturbing their rest. Features: The body thickness is approximately 10.6 mm, featuring a bionic ear-fitting curved design that does not press against the ears even when lying on the side. Powerful driver configuration provides 360-degree surround sound. The earbuds are equipped with a 25 mAh battery, paired with a 200 mAh charging case, allowing for 1 hour of charging time and a total usage time of 24 hours with the charging case. The smart three-digit display shows the remaining battery life for both the left and right earbuds. Automatic charging stops when fully charged. Equipped with a built-in HIFI quality 13 mm dynamic driver, creating a wide soundstage and balanced listening experience. The upgraded Bluetooth 5.3 chip reduces power consumption and is compatible with various Bluetooth products. Features an intelligent dual processing chip for automatic connection of either or both earbuds. The built-in new directional microphone enables high-definition calls in both ears, accurately recognizing and effectively suppressing external noise. Music and call controls are managed by tapping the buttons. With an IPX5 waterproof and sweat-proof design, no need to worry whether at the gym or running in the rain. Specification: Material: ABS Earbud Battery Type: 1 x 25mah Lithium Battery Charging Case Battery Type: 1 x 200mah Lithium Battery Power Supply Method: USB Charging Cable Power Supply ( Power Adaptor Not Included ) Bluetooth Version: 5.3 Standby time：480