spring wire antenna Gold plated spring antenna For Gold plated spring antenna 433mhz Spring Antennas : Model GBT-433-2.5DJ02Electrical Data 1,Frequency :433+/-5 mhz2,Gain :2.15dBi3,VSWR: less than 1.54,ISO9001:2000 standards5,3-7days shipmentBuilt-in antenna GBP frequency coverage 27MHZ -5.1GHZ ,with miniaturization ,all direction ,easy to install and so on ,widely used wireless keyboard, wireless mouse ,wireless hand -free headset ,car alarms and so on Packaging & delivery: Gold plated spring antennaPackaging detail :plastic bags in carton boxDelivery time : with in 3-7 days after receiving the paymentBy express like international express , Air freight Or shippingOur antenna can be optional custom frequency band ,gain length colour and frequency ,welcome to OEM product