Zeadio Professional Overhead Noise Cancelling Headset Earpiece Boom Microphone for Multipin Motorola Radio Ht1250ls Ht1550 Ht1550xls Mt850 Mt850ls Mt950 Mt8250 Etc. Excellent for use in police, military, nightclubs, bars, paintball, security,restaurants, hotels, bouncer, warehouses, and noisy environments. High quality heavy duty microphone. Transducer with Clip. Can be attached covertly to an under-garment or used overtly. This headset is for Motorola radios that require an oval side mount pin connector with retaining screw