for the following handheld transceivers: HT750, HT1250, HT1250LS, HT1550, HT1550XLS, PTX700, PTX760, PTX780, MTX850, MTX850LS, MTX8250, MTX8250LS, MTX950, MTX9250, PRO5150, PRO5350, PRO5450, PRO5550, PRO5750, PRO7150, PRO7350, PRO7450, PRO7550, PRO7750, PRO9150, GP140, GP320, GP328, GP329, GP338, GP339, GP340, GP360, GP380, GP640, GP650, GP680, GP1280. It allows you to use the above-mentioned radios with headsets designed for the following portable transceivers: AP10, AP50, AP73, AXU4100, AXV5100, CB PRO, CLS1110, CLS1410, CLS1413, CLS1450, CLS1453, CLS446, CP040, CP10, CP100, CP110, CP125, CP140, CP150, CP160, CP180, CP200, CP50, CT150, CT250, CT450, CT450-, DTR2430, DTR2450, DTR410, DTR510, DTR550, DTR620, DTR650, EP450, GP2000, GP2000S, GP2100, GP300, GP308, GP3188, GP350, GP3688, GP600, GP63, GP68 Portable GTX LTR, Portable GTX, Portable GTX Privacy Plus, Handie Pro euro446, Handie Pro SRBR, LTS2000, One A8, One BPR40, , Plus, P020, P030, P040, P080, P110, P1225, PRO3150, PTX600,