J21 Bluetooth Headset Ear Mini Mini Mini Invisible Non Flashing Long Lasting Bluetooth Headset Features: Panoramic sound effect, listen to every music scene. It enhances the depth, and sense of space of the sound. The super resolution presents a three-dimensional effect, bringing you to the music scene to feel the shock of the scene. Press and hold for two seconds to summon. Press and hold for two seconds, and you can call Sirl when you hear "beep". "Hey, sir" to talk with your favorite. Whether you want to ask to help you send messages, make calls, or charge your DJ, just open your mouth. Low noise HD call. The CvC8.0 digital noise reduction technology is adopted to intelligently filter the noise of the surrounding environment. The communication between the two parties can be clearer when they are in public places such as buses, subways, and crowded people. button is more convenient. the complexity, use a button, long press the function key for 3 seconds, the headset red and blue lights flash alternately, enter the automatic pairing, click the Bluetooth name found by the phone, and the phone will automatically establish a connection with the headset. 25m Bluetooth transmission is not hindered by distance. The signal is stable and can be heard within a 25 meter unobstructed range. Product Description: Product parameters: Product name: J21 headset Standard configuration: Bluetooth headset Product material: plastic Bluetooth version: Bluetooth 4.1 Product battery capacity: 45mah Continuous call duration: about 2.5 hours Continuous listening time: about 3.5 hours Product functions: answering and making calls, ending calls, listening to music, calling reminder, cell phone power display Product naked weight: 3.5g Package List: 1 * ear 1 * Charging cable 1 * Instructions