1. USB interface powered RF low noise amplifier, convenient power interface, moderate gain, high IP3, low noise. 2. Powered by USB type-C interface, built-in high PSRR LDO effectively reduces power supply noise and lowers background noise compared to other USB direct feed modules. 3. Compact design with system shielding cover; may rust in humid environments. Please ensure moisture protection when used outdoors. 4. USB interface powered RF low noise amplifier with built-in battery. 5. Low power consumption, suitable for portable use, flat and consistent gain, reduced background noise, compact size, extended battery life. DIY consumables: electrical Due to different batches, product appearance and printed text may vary slightly; this does not affect functionality. Type: ZK09-BM Color: Black Material: Plastic + Metal Package Contents: 1 x Low Noise Amplifier 1 x USB Cable Only the above package content is included; other items are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.