*all frequencies: most of the antenna is working at a certain frequency, such as：500-700MHz，600-800MHz，beyond  it does not work

The WD AP series works for the full frequency band, from 50-1000mhz, meaning the AP series antenna can be used for all wireless audio devices, such as AM (AM broadcast) FM (FM broadcast) SW (short wave), VHF, UHF wireless. Relative cost reduction

* flat and direct amplification: the amplification factor fluctuates little in the whole frequency range, ensuring the reliability of simultaneous use of microphones in different frequency bands

* low noise: the active module is designed with ultra-low noise, which ensures high quality audio even with post-amplifier

2dB, low noise version as low as 0.5db

* waterproof version provides waterproof function. The antenna will be damaged even if there is a little rain. AP series W waterproof version provides general waterproof function, and works normally without going into water