model: Y92S Bluetooth version: 5.4 Speaker size: 13mm, copper ring composite film Battery earphones: 35mA Charging case: standard 400mAh Charging time: 1 hour for earphones; Charging compartment for 1.5 hours Play time: Normal playback for 5H at 80% volume; Noise reduction playback at 4H and 80% volume Noise reduction depth: In-ear noise reduction depth of 25 ± 3db Transmission distance: 10 meters Color: all