This sleep headphone not only has superior sound quality and strong signal with Bluetooth 5.3 technology, but also has intelligently personalize the noise cancellation and sound performance to make you uninterrupted and immersive listening. Features: The advanced Bluetooth 5.4 technology provides a fast, stable and seamless connection for wireless earbud, syncs audio and video without latency. Opening the lid of the charging case, the Bluetooth earbuds can be automatically connected to the previous paired device and ensures a strong, continuous connection within a range of up to 12m from the paired device. The shape of mini ear buds fits the curve of inner contour of ear, offering an stable and comfortable wearing experience even when sleeping on your side. The Bluetooth headphones weigh merely 3.0g, making them as light as a feather, and the compact and sleek charging case easily fits in your pocket, allowing you to carry them with you wherever you go. The earbuds wireless features an LED digital display that makes it easy to monitor the remaining power of the charging case. It have a battery life 30 hours for the case and charging time 1 hour, providing all-day audio. Specifications: Material: ABS Color: Beige Bluetooth Version: 5.3 Speaker Diameter: 6mm Working Distance: 12m Headphone Battery Type: 1 x 30mah Lithium Battery Charging Case Battery Type: 1 x 400mah Lithium Battery Charging Time: 1 hour Battery Life: 30 hours Power Supply Method: USB Charging cable ( Power Adaptor Not Included ) Charging Box Size(LxWxH): 5 x 4.5 x 2.5 cm(Approx.) Earphone Size(LxW): 2 x 2 cm(Approx.) Package Contents: 2Pcs x Wireless Headphones 1 x Charging Box 1 X User