Description No oscillation source,need square wave(frequency 2K-5K ) to drive Audion 9012 drive; Work Voltage:3.3-5V Set bolt hole,easy to assemble PCB Dimension:3.3cm*1.3cm Pin definition Vcc 3.3~5V GND the Ground I/O I/O interface of SCM Package included: 1PCS * Passive Buzzer Module for Arduino 3PCS * 20cm DuPont line (The color of the cable is sent by random) Shipping Terms 1. WORLDWIDE Free SHIPPING. (Except China) 2. Orders processed within 24 hours of payment verification. 3. We only ship to confirmed eBay addresses. Your eBay address MUST MATCH your Shipping address. 4. The images shown are not the actual item and are for your reference only. 5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season. 6. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction! 7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. No Tracking Number The shipping cost is very low,we are not responsible for any loss in the mail if the item not insured(no-registered mail). Registered Post Shipping cost: Would better to Add 3 USD to Upgrade---- Registered Post(Choose "Standard Int'l Shipping" for one item,and others choose free shipping.we can send all your items in one box with tracking number.) Express Courier Need URGENT? We offer a varienty of shipping methods (Expedited Int'l Shipping) to meet your needs.If you need it Urgent, please contact us to Upgrade the shipping to Express. Payment Terms 1.We accept payment via PAYPAL ONLY. 2. Payment must be made within 4 days of auction closing. (Non-payment may result in a UPI (Unpaid Item) being put on your account. eBay will automatically close your account if you accumulate 4 UPI's total.) 3. TOTAL AMOUNT DUE includes the final auction price plus S&H(Shipping and Handling). 4. S&H will be determined based upon the SHIP TO address. PLEASE NOTE: S&H DOES NOT INCLUDE DUTIES, LOCATL TAXES OR ANY OTHER IMPORTATION FEES. 5. Please list your special requests (color, packages, etc.) in the PAYPAL NOTES SECTION when you make payment. Feedback We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. 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