Volume control: yes Function: Bluetooth, waterproof, noise reduction, microphone Bluetooth standard: Bluetooth v5.0 Waterproof standard: IPX-5 Active noise reduction: Yes Headphone frequency: AAC / single board computer Talk time: 4 hours Headphone battery capacity: 50 horses Charged Tme: 1.5 hours Battery life: about 120 hours Talk time: about 150 hours Frequency response: 50Hz~20KHz Bluetooth operating frequency: 2.402GHz-2.480GHz Purpose: power bank headset Usage: PC/MP3/mobile phone/tablet/laptop/audio equipment Single ear capacity: 50MAh Charging bin capacity: 2000MAh