High-impact shell: The SM18N2 speaker microphone is constructed with high-impact ABS and polycarbonate plastic, offering superior durability and resistance to harsh conditions. High-quality and clear audio: Features a high-quality speaker and noise-cancelling microphone for loud, clear audio transmission and reception. Eco-friendly PU cable and IP54 rating: Equipped with an eco-friendly PU cable reinforced with coiled wire for enhanced durability. Designed with an IP54 rating, providing protection against dust and water splashes. Back clip and 3.5mm audio jack: Includes a sturdy 360-degree rotating clip for secure and flexible attachment to clothing or straps. Fitted with a 3.5mm audio jack for reliable connectivity. Rigorously tested: Designed to withstand demanding environments, the SM18N2 has been tested for performance under high altitude, vibration, mechanical shock, thermal cycling, and electrical stress conditions. Model Number: SM18N2 Product Name: Speaker Microphone Microphone Impedance: 2.2 ohm Microphone Sensitivity: -36dB ±2dB Microphone Frequency Response: 20Hz - 1.6kHz Speaker Sensitivity: 94dB ±3dB Speaker Impedance: 8 ohm ±15% Audio Output: 2W Microphone Frequency Range: 20Hz - 16,000Hz Microphone Sensitivity: -40dB ±2dB Microphone Impedance: 2.2 kohm Compatible with Hytera models: PD700, PD700G, PD702, PD702G, PD705, PD705G, PD752, PD752G, PD755, PD755G, PD780, PD780G, PD780GM, PD782, PD782G, PD785, PD785G, PD788, PD982, PT580H, UL 913 Color: Black Material: Plastic Package Contents: 1 x PTT Handheld Microphone Note: The actual product color may vary slightly due to lighting and display differences. Measurement may vary by ±1-3cm.