Model Number: RYD SPK1219-3-CA-1406251337 Brand Name: RYD Key Specifications/Special Features: Power: 60WImpedance: 4, 8ΩThe loud range frequency range: 75-18,000HzSensitivity: 90, ±3dBRunyuda established in 2000, is one of the world’s leading manufacturers of acoustic components. We have gained leading technical competence in design and production of acoustic components. We supply a full range of polyphonic speakers, miniature receivers, multi-function devices, loud speakers, transducers, buzzers, microphones and headsets for various industries. We have partnered with some of the world’s most famous brands to produce quality acoustic components for their mobile phones, computers, cars, medical instruments, hearing aids, cordless phones, MP3 players, game consoles and many other consumer devices