Check the listing for details. NEW 433MHZ booster small relay amplifier 450c 20W small relay amplifer. Condition: New. Listed at 31.20 USD. NEW 433MHZ booster small relay amplifier 450c 20W small relay ampliferDescription20W small power amplifier, suitable for 450C and handsets DIY small relay to increase the transmission power Installation method: the transmitter part of the relay, amplifier input, power amplifier output, dual power device, antenna Baby Specifications: Input power: 0.5-5W Transmitting frequency: 400-470MHZ Output power: 18-22W Power supply voltage: 10-13.8V Standby current: 0A Minimum size: 68 * 43mm Package Included: 1PCS NEW 433MHZ booster small relay amplifier 450c 20W small relay ampliferShippingItem will be shipped within 24 -48 hours after full payment is received.Normally the shippment to worldwide is used to take 15 to 30 business days, exclude Sat & Sun.PaymentWe accept PayPal only.Payment must be received in 7 business days of auction closing.Please leave note for your special request (e.g. Colors or Size) in ebay note when you pay the order.Any special request cannot be accepted after 24 hours of payment,because most of orders will be processed instantly and same day dispatched.Contact UsIf you have any questions, please feel free to email our servicer ，and we will reply you ASAP. If no response within 24 Hours, please check the spam of mail box or kindly re-send it to us.We greatly appreciate your POSITIVE feedback. Please do NOT leave negative or neutral feedback without any contact. If you haven't received item in 45 days, please contact us and we will arrange refund or resend Feedback We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply your email as soon as possible, please kindly allow 24 hours(working day) for us to response. Thank you.We greatly appreciate your POSITIVE feedback. Please do NOT leave negative or neutral feedback without any contact.