Earpiece Compatible with Motorola radio for GP328plus GP344 GP388. GL series: GL200, GL2000. GP series: GP328PLUS, GP338PLUS, GP339PLUS, GP344, GP344R. GP366R, GP388, GP388R, GP644, GP688. EX series: EX500, EX560, EX560XLS, EX600, EX600XLS.
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