brand Features: Made of high-quality material, durable, not easy to break, has a long service life. 50mm high magnetic for high fidelity unit, big shock and good sound quality. Easy and simple to use and operate, practical and useful. It has a wide range of applications, such as tablet computer, stylus pen, learning machine, interphone, headset, TV set-top box, doorbell, radio, telephone, digital photo frame, recording pen, electronic dictionary, mobile phone, and other communication digital electronic products. Headphone Speaker only, other accessories shown in the picture are not included. Specifications: Item Type: 50mm Headphone Speaker Material: Plastic Size: Diameter: 50mm / 1.96in Color: Black Shape: Round Rated impedance: 32ohm Sensitivity: 112db Frequency response range: 20Hz-20KHZ Quantity: 2 PCS Note: No retail package. Transition: 1cm = 10mm = 0.39inch Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before purchasing. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 2 x Headphone Speaker