Bluetooth headphones with microphone - HP-011. They allow wireless audio playback and having conversations. Equipped with TF card access port. Bluetooth technology> allows wireless connection for listening to music with no cable, so you can enjoy your favorite songs without any restrictions. Built-in microphone to have conversations. Extended working time allows you to listen to music for hours on a single charge. Cable connection means that the product can be used in a classic way, too, by connecting the AUX cable to the device. Adjustable headband to adjust the product parameters to the shape of the user's head. Comfortable ear pads increase comfort of use. Specification: Bluetooth version: JL V5.0 Speaker: 40 mm Battery: 250 mAh Wireless range: 10 m Charging time: 2h Working time: 5h Standby time: 100h Frequency: 20-20 kHz