The Perfactshow Wireless Bluetooth Headphone is a Bluetooth 5.0 compatible ear hook headphone with a 2200mAh charging case. It has a dynamic vocalism principle and a frequency response range of 20-22000Hz. The headphone features touch control, auto pairing, HIFI stereo sound and IPX7 waterproof, dual connection, active noise cancellation, Google Assistant and Apple Siri support, and microphone. The package includes a user manual, charging case, replaceable pads set, and charging cable. The ear cups are semi-open and the headphone has a sensitivity of 120dB.