Features: 1, Lenovo's newest 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)