Mobile Phone Signal Amplifier Three-in-one Signal Enhancement Receiver $ 91.07 Product information: Color: Three-frequency host Scope of Application: RF coverage Product Size: 22cm * 13cm * 2.5cm Frequency range: 900MHz/1800MHz/2100MH Packing list: Signal amplifier1 Power adapter 1 Instruction manual 1 Adaptor 1 set Product Image: