Waterproof Rainproof Shoulder Remote Speaker Microphone for Baofeng Waterproof Walkie Talkie BF-A58 BF-9700 UV-9R. Features: -Make from high quality plastic, not easy to break; -360 degrees rotatable clip is attached on the back; -Push to talk button on the left; -Heavy-duty cable assembly with strain relief. Specifications: Sound Pressure Level: 94dB 3dB Frequency Response: 20-16000 Hz Impedance: 8 15% Sensitivity: -38 dB 2dB Audio Output: 1W