Transmission range: 10 meters Function: NFC function, 246678372, 248642843, 124895962, 248664073, 152590888 Bluetooth protocol: 5.0 How to use: earplugs Whether single ear or double ear: unilateral hands-free Color: black, white, silver, rose gold, local gold Mold type: private mold Chip type: Zhongke Lanxun Battery life: 48 (hours) Style: creative design Waterproof performance: IPX3
