20 hours of long-lasting battery life, no need for frequent charging The combination of active noise reduction eliminates external noise, conversations and other types of noise The sound-isolating all-inclusive earmuffs are gentle and non-pressure on the ears, bringing a comfortable noise-reduction listening experience Built-in 40mm titanium-plated composite speaker unit, combined with high-thrust rubidium magnets, pushes the sound quality to a new level Built-in colorful RGB lighting effects, combined with a stylish appearance Specification: Material: ABS plastic + hardware bracket + PU leather earmuffs Frequency response range: 20Hz-20kHz Bluetooth-compatible version: JL AC6955F V5.3 Bluetooth-compatible protocol: HFP, HSP, A2DP, AVRCP, PBAP Bluetooth-compatible distance: ≤10M (depends on mobile phone function) Memory card playback format: MP3 WAV/WMA, maximum 32GB, format FAT FAT32 Talk time for listening to music: 20 hours (lights off), 12 hours (lights on) Battery capacity: DC 3.7 V DC 400mAh Charging time: about 2H Speaker size: Ф40 mm neodymium ferromagnetic speaker Speaker impedance: 32Ω±15% Microphone sensitivity: -42±2dB Charging interface: Type-C Package included 1 x Headphone 1 x Audio Cable 1 x Charging Cable 1 x English User Manual Specifications Brand YESIDO Color Black Packaging Type Colored Box Plug Type (For Supply) N/A User Manual (Language) English Gross Weight 0.295kg Volume Weight 0.470kg Package Length 19.200cm Package Width 18.200cm Package Height 6.000cm