Motorola RAE4004ARB - Built for people on the go, who still want to maintain strong two way radio communication with their team - an ideal accessory if this is you. This roof mount 5dB gain. This antenna is designed to direct the signal more towards the horizon, and is perfect for use in more geographically flat regions where signal coverage is sparse and must cover a larger area. Built for UHF. Compatible with XPR5000, CM Series and XPR2500 mobile two way radios from Motorola.