GPS/GSM Gain Built-in Antenna Description: Product Model: GBP-900-1800-2.0A Band (MHz): 820-960&1710-1990 VSWR: ≤ 1.5 Gain: 3.0 dBi Size: 80*20(mm) We can also customize as your requirements totally!! If you have any questions,pls feel free to contact us.Thank you!