Nagoya NA-320A Triband SMA-F for 144, 220, 440Mhz Antenna for AnyTone handheld

Nagoya Antenna NA-320A is 17.7 inches long.
May Require a Rubber spacer (included) and has an extended antenna cover to protect your radio SMA male base from the elements. 

• Frequency Range: 136-174MHz, 220-225MHz, 400-520MHz.
• Gain: 2.15dBi
• Max power: 10 Watts
• VSWR : Less 1.5:1
• Impedance: 50 OHM
• Connector: SMA-F
• Length: 17.7 inches
• Impedance: 50 OHM
• RoHS Compliant
• Upgrade for BCH-220, BCH-270, and AnyTone D868UV/878UV/878UVII/890UV , 

Nagoya antennas will increase your radio's transmitting gain as compared to the stock antenna.
In most cases: the longer the antenna, the better the antenna is capable of boosting weak frequencies and receiving difficult to hear stations.
Shorter antennas offer more portability and convenience, while longer antennas generally perform better.