Brand Name : CATASSU Control Button : Yes Active Noise-Cancellation : Yes Style : Headband Wireless Type : Bluetooth Connectors : USB Communication : Wireless Vocalism Principle : Dynamic Volume Control : Yes Frequency Response Range : 20-20000Hz Function : For Mobile Phone Sensitivity : 84dB Is wireless : Yes Plug Type : Wireless Support Memory Card : Yes With Microphone : Yes Model Number : bluetooth headset Resistance : 32Ω Waterproof : No Line Length : 1.2m Support APP : No Frequency : 2.40GHz-2.48GHz version : bluetooth V5.0 effective distance : <10meters Support system : Mobile Phone,Computer TV all have bluetooth function Playing time : about 20 hours Power supply : powered by rechargeable 400MAH battery charge time : 2~3hours Speaker : high quality 40 mm diameter speaker MP3 mode : support SD card playing MP3