Compatible Models: SL300, SL500, SL500e, SL3500e, SL4000, SL4010, SL7550, SL7550e, SL7580, SL7580e, SL7590, SL7590e, SL8050, SL8550e, SLN 1000, TLK100, TLK110, SL1K Built-in Microphone: It captures your voice with exceptional clarity. Whether in a noisy work environment or during outdoor activities, your messages can be accurately conveyed, facilitating smooth conversations. Large PTT Button: Equipped with a large and easy-to-press PTT button, quick and intuitive communication is right at your fingertips. This design allows for effortless operation, even when you're wearing gloves. Rotatable Clip: Two rotatable clips can adapt to different wearing styles and angles, providing you with maximum comfort and flexibility. Adjust them according to your preferences to achieve the perfect fit in any situation. Extra Silicone Transparent Earplugs: In addition to its outstanding features, we include two sets of silicone transparent earplugs, offering different sizes. You can adjust the ear tips according to your needs.