Features: 1. 3.5mm interface FM radio antenna, replace the traditional headphone cable as an antenna. Convenient, practical, good radio effect. 2. Applicable to multiple brand models of card speakers/cell phones with FM radio function. 3. Plug and play, your device signal receiving ability is stronger. 4. Small size, easy to carry around. 5. Made of ABS material, environmentally friendly and not easy to damage. Specification: Material: ABS Color: Black Condition: 100% Brand New Package List: 1 * Antenna Note: 1. Most mobile phones and speakers recognize the product as a headset. Once plugged in, the sound will be output to the headset by default. You need to switch the phone or card speaker to the outside, otherwise you will not be able to hear the sound. 2. This product can be correctly recognized by most mobile phones such as for Samsung, HTC, LG, Huawei, Lenovo, ZTE, Nokia and card speakers, only a few parts, such as for Xiaomi 1 generation can not correctly identify this antenna, about the problem that the mobile phone cannot be correctly identified is a defect in the design of the mobile phone software, which has nothing to do with the quality of the antenna. 3. Regarding the radio performance problem, we all know that the radio effect is good or bad, which is determined by many factors. If you find that you are not receiving the radio, please try again on the open height, or try another model phone to further determine the source of the problem. For problems caused by non-antennas such as mobile phones or the environment, it cannot be attributed to the antenna quality..