1. Low Output Impedance: Designed to provide extremely low output impedance to effectively drive loads with low input impedance, reducing signal attenuation and distortion. 2. Built-in Battery: Equipped with a 600mAh Li-Ion battery that provides approximately 20 hours of continuous use on a full charge. 3. Miniaturized design: The low-impedance converter is designed to be more compact and portable. 4. Upgraded interface: Adopting Type-C charging interface, which is more convenient to use. 5. Strong compatibility: Support 10k-180MHz frequency range, suitable for a variety of application scenarios. UV UHF + VHF FM Mini Loop Antenna 400M-470MHz 80M-150MHz SMA Suitable for HFDY Malahiteam DSP2 radio receiver, walkie-talkie antenna, radio antenna, radio antenna, U segment for 400MHz to 490MHz, V segment for 80MHz to 150MHz, V segment diameter 10cm, U segment 5cm can transmit. 5cm can be transmitted. The interface is SMA male with pin Frequency: 10k-180MHz Charging interface: C type Connector: SMA male (inner pin and inner wire) Charging current: 1A Charging voltage: 5V Battery: Built-in 600mAh Li-ion battery, (can be used continuously for about 20 hours after fully ) Charging time: 4 hours Charging: red light Fully : green light Color: As Shown Material: Plastic + Metal Package Contents: 1 * Donut Broadband Receiver Antenna 1 * Low Impedance Converter 1 * VHF Antenna 1 * UHF Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.