Wireless Bluetooth 5.0 Headset Over-ear Folding Headphone With Mic B28 Features: 40mm large dynamic coil unit, better sound quality Bluetooth 5.0 technology, stable signal, 10m effective distance Noise cancellation makes a clear call Adjustable headband and soft earmuff, comfortable to wear Folding and space-saving, easy to store and carry Download the ZEALOT APP to listen to massive radio stations With a 3.5mm universal audio jack With LCD screen Specifications: Brand: Zealot Model: B28 Battery capacity: 500mAh Speaker: 32Ω * 2 Charging voltage: DC 5V Bluetooth version: V5.0 Transmission distance: 10m Working voltage: 3.7V Frequency response: 20Hz-20KHz Distortion: ≤1% Signal-to-noise ratio: 85~100dB Talk time: 8 hours Playtime: 10 hours Charging time: 2.5 hours Package Included: 1 x ZEALOT B28 Wireless Bluetooth 5.0 Headset 1 x USB Charging Cable 1 x Audio Cable 1 x User Manual