Swissten Jumbo - incredibly comfrotable wireless Stereo headphones Active Noise Cancelling 16 hours operation time 8 hours with ANC Function Pure Bass Foldable Call and music Input USB-C Closed Earmuffs Specifications: Active noise reduction: arounf 20 + 3 dB dueing 100 - 1000 Hz Version: Bluetooth V5.0 (ATS chipset) Frequency Range: 2.402 GHz - 2.480 GHz Transmission: CLASS 2 Channels: 79 Channels of 1 Mhz BW Operation rande: 10 m Requency Responses: 20 Hz - 20 kHz Speaker sensitivity: 97 dB +/- 3dB Speaker diameter: 40 mm Speaker impedance: 32 Ω Signal to Noise rate: 80 dB Driver output: 2 x 30 mW Status Indicator: Red, Blue inticator Compatibility: Suitable for HFP, HSP, A2DP, AVRCP Battery: Li - polymerbattery 300 mAh Charging time: 2 hours Input: 5V DC 0.3 A Working time: max 16 hours Working time with ANC: 8 hours Waterproof rating: IPX3 LED indication USB-C input ANCOn / Off Volume+or next song MFB - power ON/OFF, answer or end phone call or play/pause AUX 3.5 mm Microphone