Each invisible headset is only 0.25 inches (about 0.6 cm) in size and weighs 0.1 ounce (about 2.8 g). This is the world's smallest invisible Bluetooth headset. Long-term wear will not cause damage. Girls and women with small ears can also wear it. But it is very stable to wear. Its design is suitable for cochlea, not easy to shake, and wear-resistant. This is a good choice for exercise This headset is developed by a 350mAh charging box, which can continuously charge the mini headset for 3 times. Full-power hidden headset can use 36 hours to listen to music or make phone calls, with a standby time of up to 140 hours, which is convenient to go out without frequent charging [High Fidelity Noise Reduction] High Fidelity sound quality, cinema-level sound effect, professional acoustic team tuning, medium and high frequency vocal enhancement, beautiful sound quality. Real active noise cancellation allows you to enjoy beautiful and clear music outdoors Bluetooth 5.0 has stable connection, stable connection, non-blocking and continuous connection. This mini wireless headset can be used within 30 meters of the mobile phone. Touch PlayBy touching the headset, you can switch songs, pause/play, answer/end calls, voice assistant, etc. Turn on the Bluetooth of the phone. Once the protection is activated, the headset will automatically connect to the pairing cover. Can be used for one and two ears. Put any one back into the cargo hold and the other P