Model Number: HRE-3216-1 Brand Name: GREEN CENTURY Key Specifications/Special Features: With ear hook and ear bud With durability and reliability, clear voice for discreet communication Ear bud, ear hook, push to talk Plug VOX control is available Excellent audio reproduction and robust construction as well as rugged PTT button to control microphone High noise canceling microphone Inter texture wire, more durable and legerities Works better in temperature of -20 to 90°C Suitable with Motorola, Kenwood, Icom, Yaesu/Vertex, Maxon and Kirisun Speaker:Dimensions: Φ20mm Impedance: 8Ω ± 15% Frequency response: 420Hz to 20kHz Sound pressure level: 102dB ± 2dB Maximum power: 50mWMicrophone:Dimensions: Φ6mm Impedance: 2.2kΩ Sensitivity: 54dB ± 2dB Frequency response: 100 to 160Hz Directivity: omnidirectionalWire:Diameter: Φ3.0mm/Φ2.2mmAvailable in various kinds of two-way radio earpiece with ear hook and ear bud, which have durability/reliability, clear voice for discreet communication, also with ear bud, push to talk/plug, VOX control is available, excellent audio reproduction and robust construction and more All brands and trademarks shown here are only for references. We are not authorized to sell any products bearing such trademarks and brands.