Speaker. Product name: 3-inch full-range speaker. Impedance: 4 Ohm/8 Ohm ±15%. Rated power: 15W. Resonance frequency: 80Hz. coil diameter: 20MM. Frequency response range: 80Hz-20KHZ. Sensitivity: 87db±3db. coil diameter: 20.4MM. Shape: square/round. Packing List: 2Pcs x Speakers. Hign-concerned Chemical: none. Input/Output: other. Sound Mode: other. Category: Speakers. Use: HOME. <;25 W. Control: No. Frequency Range: Other. Output Power: Other. Display Screen: No. Waterproof: No. Support APP: No. Support Memory Card: No. Material: Metal. Playback Function: None. Remote Control: No. Support Apt-x: No. Intelligent Personal Assistant: none. Display Screen: No. Built-in Microphone: No. Audio Crossover: Full-Range. Number of Loudspeaker Enclosure: 2. Power: None. PMPO: 15W. Channels: 2 (2.0). Feature: None. Battery: No. Communication: Audio Line. Speaker Type: Portable. Cabinet Material: Metal.