Headset Wireless Bluetooth 5.1 Headphone For Learning Business Online Courses Earphone With Earphone Mic Support-card Playing Android And IOS Feature: Product type: Bluetooth Earphone Material: ABS Product color: White Packing size: 20.5x17.5x8.8cm/8.07x6.88x3.46in Product weight: 228g/0.50lb Bluetooth protocol: 5.1 Transmission distance≥10m Use time: about 6-8 hours Battery Capacity : 400mAh Charging Voltage : 5V -card: MAX 32G (Not included) Description:. Fashion wireless ear Mic Bluetooth headphone, It can be used for business, office, telephone, learning, etc. It can be used for excellent communication anytime and anywhere, with clearer calls, and more efficient work 9D stereo hifi sound effect ,The earphone is equipped with 40mm moving coil unit to make the sound field wider; Polymer diaphragm, powerful bass; High pitched extension and melodious. Structural design that fits human ear to upgrade listening experience, It has been greatly optimized in the wearing experience. It is more comfortable and firm to wear. It is equipped with advanced audio processing technology to bring Ric-h and full sound quality and let you feel excellent sound effects. Large capacity,, Low-power technology, built-in large capacity lithium battery to your wireless music, you can listen to it if you want. HD call, intelligent noise reduction, Dual channel wind proof cavity design with Bluetooth call noise reduction technology, greatly eliminating wind noise and other environmental noise, and CALM coping with noisy environment. Multiple devices are wide ion, Support Bluetooth, plug-in card and wired mode, configure 3.5mm audio cable interface, and be computer mobile phones and tablets， you can use them Free Package Included: 1xBluetooth headset 1xUSB cable