Feature: 1. Super Thin Design: These wireless ear clip headphones feature a super thin design, making them comfortable to wear while sleeping or during daily activities. 2. Bluetooth 5.3 Technology: With the latest Bluetooth 5.3 version, these headphones provide a stable and fast connection, ensuring excellent sound transmission. 3. Long Transmission Distance: The headphones have a transmission distance of up to 10 meters, allowing you to move freely without worrying about signal loss. 4. Wide Frequency Range: The headphones cover a wide frequency range of 20Hz to 20KHz, delivering rich and detailed sound for an immersive listening experience. 5. Type C Charging Interface: The headphones come with a Type C charging interface for convenient and fast charging. Say goodbye to tangled cables! Specification: Item Type: Bluetooth Sleep Earbuds Material: ABS Bluetooth Version: V5.3 Support: A2DP, AVRCP, HFP, HSP Transmission Distance: 10m Frequency Range: 20Hz to 20KHz Sensitivity: 115dB/mW Charging Interface: Type C Earbud Battery Type: 2 x 30mAh Lithium Ion Batteries (built In) Charging Case Battery Type: 300mAh Lithium Ion Battery (built In). Package List: 2 x Earbuds1 x Charging Case1 x Charging Cable1 x Instruction Manual