2Pcs Speaker 3 Watt 8 Ohm Single Cavity Mini Speaker Full-Range Cavity Advertising Machine Speaker Connector Mini for arduino speaker: 8 ohm 3 watt; Its connector is separating, One-to-Two interface, can choose 3.3V or 5V, JST-PH2.0mm-2 pin terminal; Full frequency cavity; 31 mm long, 28 mm wide, 15 mm thick. Applications: Arduino; Robot; Raspberry Pi; Advertising Machine; Game Machine; Integrated Machine Special Speaker. Shape: Rectangle; Diaphragm material: non-paper; Magnetic circuit form: internal magnetic. Frequency characteristics: full band (full range); Rated power: 3 (W); Rated impedance: 4 ohms 8 ohms ( ohm); Frequency response: 500-20K (kHz). Colour: black Material: plastic Package Contents: 2 * diy speaker Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.