Product parameters: Bluetooth version: Bluetooth 5.4, Bluetooth effective distance: 10m, Features: Intelligent real-time translation, low power consumption, HIFI audio, Control method: Touch, Noise reduction technology: ANC+ENC, Headphone battery capacity: 28mAh + 28mAh, Charging room battery capacity: 450mAh, Music Duration: 4H, Charging time: 1.5H. Packaging list: headphones * 1 pair, charging compartment * 1, charging cable * 1, instruction manual * 1, translation user manual * 1. Smart Translation: 144 Languages, 0.2s Response, 99% Accuracy. Smart Interaction: Touch Control, Mode selection, Utilities. Acoustic Excellence: HiFi Audio, Dual Noise Cancellation, Stable Transmission. All-Day Endurance: 4~70 Hours Use, Optimized battery.