The size and weight of Xiaomi Bluetooth headset are 4.4g for single ear,18.62mm× 30.68mm×19.70mm, and the charging box is 37.65g, 50.90mm×58.09mm×26 respectively. 98 mm. It adopts 35mAh earphone battery and 480mAh charging box battery, and supports Type-C charging port. In terms of input parameters, the earphone is 5V? 0. 1 1A, charging box 5V? 1.2a. The output parameter is 5V? 0.22A In terms of music playing time, it can reach 30 hours in noise reduction and long battery life mode (including using headphones and charging boxes); It can reach 6 hours in noise reduction and short battery life mode; But it can reach 20 hours in noise reduction and long battery life mode (including using ears and charging). In terms of working distance, the connection distance of 10 meter can be realized in barrier-free and open environment. The protection level of taxis is IP54, in which the goal is to prevent the entry of dust and the resistance of water spraying in the bathroom.