Check the listing for details. Krown Phone Strobe Flasher. Color: N/A, Condition: New. Listed at 41.92 USD. The lightweight Phone Strobe Flasher flashes when there's an incoming telephone call alerting you visually without audible sound. To use plug the Strobe Flasher into the wall phone jack then plug your phone into the Phone Strobe Flasher. Features:Works with telephone videophone and most PBX phone systemsDome-shaped cover and bright 10 candela LEDPlugs into wall phone jackPowered by telephone line - no batteries required [Click for user manual]" SKU: KM-PSF-HA 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.