General description Upgrade your two-way radio experience with this set of 10 pairs of volume knobs and channel selector knobs. Designed for a variety of radio models, these accessories ensure smooth operation and easy adjustments. Technical specifications Color: Black Material: ABS Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with models: GP328, GP338, GP338 Plus, GP3688, GP320, GP330, GP340, GP344, GP360, GP380, GP388, GP640, GP680, HT750, HT1250, HT1250LS, HT1550, HT1550XLS, CP040, CP140, CP150, CP160, CP180, CP185, CP190, CP200, EX500, EX600, EX600XLS, EP350, EP450, PR400, PTX600, PTX700, PTX760, PTX760+, PRO3150, PRO5150, PRO7150. Package Contents: 10 x Volume Knobs, 10 x Channel Selector Knobs Other information