Bluetooth 5.3 connectivity for fast and stable transmission, no jams in music and video, clear calls and low latency, enjoy the audio and video synchronization experience Colorful light creates a cool gaming atmosphere, making you more immerse in the mobile game The 400mAh large-capacity battery can listen to music for a long time, and you are not afraid of power failure when traveling outdoors The earmuffs can protect the ears gently while shielding the ambient noise Compatible with a wide range of Bluetooth-enabled electronic devices, including computers, laptops, smartphones, and tablets, making them a suitable choice for various needs Specification: Bluetooth version: V5.3 AC6925F Audio channel system: Stereo 2.0 Supported protocols: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RFCOMM, SDP, L2CAP Battery capacity: 400mAh Battery life: 7h (lights on); 12h (lights off) Charging time: 2.5h Charging voltage: DC 5V Frequency range: 2.402~2.480GHz Transmission distance: more than 10 meters in the forward direction without obstacles Speaker driver diameter: 40mm Speaker sensitivity: 118±3dB Speaker impedance: 32Ω Microphone sensitivity: -42±3dB Microphone impedance: 2.2KΩ