LISHENG IH-MT25 Handheld Speaker Microphone for LISHENG LS-A5 LS-A8 LS-V90 etc. Brand: LISHENG. Model: IH-MT25. the units are compatible with the models mentioned in product description " Push-to-talk button and microphone are located on the accessory for quick and easy use. Great for noisy AND quiet areas because speaker is located right near user's ear. Radio can be placed anywhere with Microphone/Speaker conveniently located - wear it on your collar to keep the volume near your ear Built-in PTT and microphone is very handy. Talk and listen without ever holding your radio. Includes one-year manufacturer LISHENG warranty.