Product parameters: Product model: JM19, Material: Plastic + Metal, Transmission range: ≥10 meters, Bluetooth protocol: 5.4, Horn diameter: 10mm, Operating voltage: 3.7V, Charging port: Type-C, Color: black, beige, Headphone battery capacity: 40mAh, Charging chamber battery capacity: 300mAh. Packing list: 2x Bluetooth headset, 1x charging case, 1x Instruction Manual. Product selling points: Interactive Screen, Battery Performance, Real-time Translation, Customizable Audio Experience, Durable & Waterproof Design.