? High-Quality Plastic Build – Made with durable and heat-resistant plastic, this H4 3-pin female socket connector ensures stable and secure headlight wiring connections for long-lasting performance. ? Waterproof & Weather-Resistant – Designed with moisture-resistant materials, this headlight bulb holder prevents short circuits, corrosion, and damage, making it ideal for all-weather vehicle use. ? Universal H4 Bulb Compatibility – Fully compatible with H4 halogen, LED, and xenon bulbs, making it a versatile headlight wiring solution for cars, bikes, motorcycles, and other vehicles. ? Easy Plug-and-Play Installation – The simple plug-in design allows for quick installation without complex wiring modifications, making it perfect for automotive DIY repairs and professional use. ? Secure & Stable Power Connection – The firm grip and strong locking mechanism prevent flickering, loose connections, or power loss, ensuring efficient electrical transmission for better visibility.