Details Features - 1; Lenovo's latest design gaming earphones in 2022. Top gaming chip design 2; Music/Game dual mode; sound quality synchronization and low latency 3; Bluetooth V5.3; support most of Bluetooth devices and lower power consumption 4; ENC call noise reduction effectively suppress environmental noise. 5; Single and binaural use independently; regardless of master-slave switch arbitrarily. Specification Model - Lenovo GM2 Pro Bluetooth Version - V5.3 Speak Unit - 10 mm Battery capacity - 40mAh Usage Time - About 5 hours(Earphones) Charging Time - About 1 hour(Earphones) Frequency Range - 2.402-2.480KHz Transmission Distance - Up to 10 meters / 33 feet Charging Compartment Battery Capacity - 350mAh What's in the box 2 x Bluetooth Earphones 1 x Charging Case 1 x USB Cable 1 x User Manual 3 x Earphone Cups(S; M; L Size)