Features: Made of high-quality material, durable, not easy to break, long service life. 50mm high magnetic for high fidelity unit, strong bass and good sound quality. Easy to use and operate, practical and useful. Wide range of applications, suitable for tablet computers, stylus pens, learning devices, intercoms, headsets, TV set-top boxes, doorbells, radios, telephones, digital photo frames, recording pens, electronic dictionaries, mobile phones, 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 packaging. Transition: 1cm = 10mm = 0.39inch Please allow 0-1cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. Due to differences between monitor displays, the image may not reflect the actual color of the item. Thank you. Package Includes: 2 x Headphone Speaker