Single Ear Hook Type: Ear hook earphone, easy to use, ergonomic design, comfortable to wear, uninterrupted use, small appearance, light weight. High Quality Material: Free large, medium and small earphone silicone sleeves, suitable for long term wearing, soft hand feeling, tensile strength wire and durable gold plated plug. High Quality Microphone: Active noise reduction, anti static, high sensitivity built in microphone, flexible pole, ensure accurate speaking position, provide quality communication. Package List 1 x Headphone 2 x Spare Earphone Silicone Case Note 1. Please point the microphone to your mouth to get the best call effect. 2. Manual measurement, please allow some errors.