Product Features Intelligent Noise Reduction: Physical noise reduction and anti-jamming to meet your requirements Skin Care Material: High elasticity soft protein earpad and ergonomic headwear design, long wear without pain Enjoy An Auditory Feast : 40mm large moving coil unit, bass, shock, treble clear Portable Folding: Portable folding design, easy to put into the bag, carry you Keyboard Easy Operation: Through the button, easy to control the various functions of headphones Strong Compatibility: Support multi-platform music software widely compatible with any devices that have bluetooth Product Specifications Wireless Version: 5.0 Support Profiles: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RFCOMM, SDP, L2CAP Operation Distance: 10m Transmitting Power: Class 2 Frequency Range: 2.402 -2.480 GHz Speaker: Ø40mm Impedance: 32?