Makerhawk 2Pcs Speaker 3 Watt 8 Ohm Single Cavity Mini Speaker Full-Range Cavity Product Details Mini ar duino speaker: 8 ohm 3 watt; Its connector is separating, One-to-Two interface, can choose 3.3V or 5V; Full frequency cavity; 31 mm long, 28 mm wide, 15 mm thick Applications: Ar duino; 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 (?); Frequency response: 500-20K (kHz) Strong After-sales Service Team: As long as you have any questions about the product, we will resolve your issue immediately if received your email, your satisfactory purchase experience is our greatest hope! How to email us? Plz click ?MakerHawk-US? and click ?Ask a question? to email us! Looking forward to your consultation Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.