Item Type: Wireless HeadsetMaterial: ABSBluetooth Version: V5.0+EDRFrequency Response Range: 20Hz-20KHzSpeaker: 40mm / 1.6inImpedance: 32Noise Reduction: CVC6.0Card Playback: Support To Play Songs in an External Memory CardBattery Type: 400mAh Li ion Battery (built in)Package List1 x Wireless Headset1 x Charging Cable1 x Cable1STRONG BASS: Wireless headset has a 40mm moving coil unit, which has a strong bass burst that is as clear as the scene. 2HIGH PERFORMANCE: Wireless over ear headset Bluetooth 5.0 chip, low power consumption, high stability, allowing you to enjoy wireless. 3SOFT EARMUFFS: Wireless headphone large ear shell design with leather earmuffs, giving you a comfortable experience. 4FOLDABLE DESIGN: Foldable Bluetooth headphone movable boom can be adjusted and retracted, which is easier to carry when folded. 5GOOD SOUND QUALITY: Bluetooth over ear headphones give you a different listening experience with good sound quality.