Check the listing for details. [3DMakerWorld] Adafruit Thin Plastic Speaker w/Wires - 8 ohm 0.25W. Condition: New. Listed at 9.30 USD. [3DMakerWorld] Adafruit Thin Plastic Speaker w/Wires - 8 ohm 0.25W [3DMakerWorld] Adafruit Thin Plastic Speaker w/Wires - 8 ohm 0.25W Key Features: Perfect addition to any audio project 8Ω impedance and 0.25W of power Originally designed for 'talking' greeting cards Very simple, plastic body is extremely lightweight and thin Listen up! This 1.5" diameter speaker cone is the perfect addition to any audio project where you need an 8Ω impedance and are using 0.25W of power. The speakers are rated at 0.25W, with a maximum input of 0.5W (printed wattage on back of speaker may have either value). We particularly like this cone as it's very simple and its plastic body is extremely lightweight and thin. Originally designed for 'talking' greeting cards, its fairly loud yet lightweight. Works great with Adafruit's Wave shield or class D amplifier board. Just be careful not to overdrive the speaker as high volumes can blow it out! Start with lower volume and increase carefully. Item Specifics Resonant Frequency: 440 ±20% HZ Impedance: 8 ohm ±15% at 1500HZ Rated Input Power: 0.25 W Maximum Input Power: 0.5W - printed wattage on back of speaker may have either value Frequency Range: 440~20KHz Diameter: 39mm / 1.5" Weight: 4.6g