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RUKEY Two-Way Radio Accessories Microphone Portable Speaker RadiosSpeaker Microphone with emergency button (IP54) Description: -Super flexible PU cable reinforced with Kevlar for maximum durability,Soft and skin-friendly material provides comfort for long-time wear. -Brand-new Remote speaker microphone Dramatically lessens background noise from high winds and other severe weather conditions.Audio can pass through the speaker grill even when blocked by water. Feature: Speaker Specifications Sound pressure level: 97 ± 3dB (300 ~ 3000Hz average 1W, 30cm) Power: 2W (rated) / 3W (max) Impedance: 20Ω ± 15% @ 1kHz Microphone Specifications Sensitivity: -42 ± 3dB @ 1kHz 3v 2.2k 0dB = 1v / Pa Output Impedance: ≤2.2kΩ Operating temperature: -30 ~ 75 ° C Storage temperature: -40 to 85 ° C PTT cycle life: ≥100000 Protection class: IP54 Compatible models: Motorola * GP Series: GP140, GP320, GP328, GP329, GP338, GP339, GP340, GP360, GP380, GP640, GP650, GP680, GP1280 * HT Series: HT750, HT1250, HT1250LS, HT1550, HT1550XLS * MT Series: MT850, MT850LS, MT950, MT8250, MT8250LS, MT9250 * PRO Series: PRO860, PRO5350, PRO5450, PRO5460, PRO5550, PRO5750, PRO7150, PRO7350, PRO7450, PRO7550, PRO7750, PRO9150 * PTX Series: PTX700, PTX760, PTX780 * MTX Series: MTX950 MTX 950, MTX960 MTX 960, MTX8250 MTX 8250 MTX8250LS MTX 8250LS, MTX9250 MTX 9250 Notice: If your radio model not listed above, please email us your model number, then, we will help you find one that suit for you.