Specifications: High-quality, gold-plated headphone jack adapter. Connector A: 6.35mm (1/4 inch) stereo jack. Connector B: 3.5mm stereo jack. Fully shielded die-cast metal housing. 6.35mm to 3.5mm adapter: This adapter allows you to connect smartphones, tablets, or headphones with a standard 3.5mm (1/8 inch) jack to most headphones with a 6.35mm (1/4 inch) jack. A practical and cost-effective solution for professional audio equipment such as amplifiers, electric/digital pianos, Yamaha keyboards, home theater systems, AV receivers, etc. Headphone jack adapter: This 3.5mm to 6.35mm stereo jack adapter converts a 3.5mm jack to a 6.35mm stereo jack, allowing you to play a digital piano with any standard headphones without disturbing others. The ideal solution for saving money on new headphones while getting excellent stereo sound quality. Superior craftsmanship: This 6.3mm to 3.5mm audio jack adapter is made of solid brass, making it more durable than plastic plugs with a metal finish. The 24-karat gold-plated connector is corrosion-resistant and minimizes signal loss. Simplified use: This adapter allows you to connect any 3.5mm jack plug to a 6.35mm jack. Thanks to its 360° threading, it connects and disconnects effortlessly. Its compact and lightweight design makes it the perfect companion for school, work, and vacation.