Check the listing for details. Uniden Bc645 Uniden 4 Pin Electret Replacement Microphone For Pro505Xl, Pro510Xl. Color: N/A, Condition: New. Listed at 24.84 USD. UNIDEN 4 PIN ELECTRET REPLACEMENT MICROPHONE FOR PRO505XL, PRO510XL, PRO520XL, PRO538W AND OTHER MODELS Manufacturer: Uniden Manufacturer Part#: BC645 UPC: 050633550526 SKU: BC645-CB Return Policy Returns will not be accepted without a Return Merchandise Authorization Number (RMA). Refused Delivery: It will be subject to a 20% restocking fee. The customer will also be responsible for the return shipping cost incurred by the action of refusing the delivery. Consequently, amount of refund will be issued less 20% restocking fee of the value of the merchandise and less shipping and handling fees both ways. All shipping and handling fees are non-refundable with an exception where we have made an error by shipping and incorrect item to the customer.