PRODUCT MATERIAL:Metal, PCPACKAGING MATERIAL:PVC+COLOR CARDHOW TO USE:Plug and play;Do not use high power player; Suitable for most mobile phones on the market; Answer button: click to answer when the call comes in, click to hang up when the call ends, click to pause/play when listening to music.FEATURES: Sound quality: medium-high frequency, sufficient reverberation, wide and even frequency response.Product features: 1. The inner conductor of earphones is made of varnished wire with superfine high-pure oxygen-free copper; 2. The cable skin is made of high elasticity and halogen free TPE, greatly increase the product lifespan; 3. High-end and stylish appearance; 5. Parameters: Rated power: 5mW; Maximum power: 20mW; Frequency response: 20-20KHZ; 6. Standard 3.5mm earphone plug, can be used on most portable playing devices, such as smart phones, tablets, laptops, MP3 or professional audio players etc.PRECAUTIONS:1. Long-time continuous use may cause damage to your ears; 2. Do not use when driving a vehicle.STORAGE METHOD:Store in dry place, keep away from fire and humidity.