Features • M4 Terminal Block Compatibility: Ideal for use as an inverter terminal with a panel opening size of 1m, ensuring seaml integration with various devices • Versatile Application Range: for electronic instruments, industrial equipment, inverters, and welding machinery, making it a reliable choice for diverse projects • Copper and ABS Material: Constructed from copper and ABS, this terminal block offers a long service life and resistance to damage, ensuring dependable performance • High-Efficiency Pure Copper Design: Features pure copper terminals for optimal conductivity, paired with insulating materials to enhance safety and performance in electrical connections • User-Friendly Installation: The innovative nut system allows for easy installation, providing flexibility to securely tighten connectors without the risk of loosening over time Features: 1、Application: The built？in spring antenna is suitable for various 43Hz/470MHZ wirel modules and ligent remote control equipment. 2、IPEX Connector: The interface is specially designed as IPEX type, which is not easy to age, and makes the signal more sensitive at the same time. 3、Stable Signal: The standing wave ratio of 3DBi built？in antenna is lower than 1.5, and the signal is stable, bringing you more convenience. 4、Excellent Performance: RG1.13 wire high density braided shielding layer, oxygen？ core, high conductivity and low loss. 5、Profional Production: Have undergone extensive quality and safety testing to ensure long service life and strong durability. Specification: Item Type: 3DBi Built？in Antenna Material: Pure Copper + RG1.13 Wire Purpose: Signal stabilization and gain Frequency Band: 433-470MHZ Gain: 3dbi Standing Wave Ratio: between1.5 Impedance: 50Ω Polarization Method: Linear Polarization Interface Form: IPEX Interface Power: 50W Working Temperature: -40℃ to +65℃ Application: For various 43Hz/470MHZ wirel modules and ligent remote control equipment. Package List: 10 x 3DBi Built？in Antenna Package List 10 x 3DBi Built‑in Antenna