Diamond (Original) SRHF40 144/440 MHz. SuperFlex High Gain Dual-Band Handheld Antenna Rx: 120-900 MHz. (Gain: 440 Mhz. 2.15 dBi, Max Power: 10 Watts, Length: 16") SMA DIAMOND 144/440 MHz. Dual-Band Flexible Scanner Handheld Antenna Receive 120~900 MHz. (Gain: 440Mhz. 2.15dBi, Max Power: 10 Watts, Length: 16") SMA