In this set, it can only strengthen the band 1 band 8 signal before purchasing, Test whether the signal band of your phone is band 1 band 8Band 1/8 Test the frequency band of your cellphone method: 1. Call "*3001#12345#*" 2. Click "Cell By Band" under LTE 3. See the number behind "band" Android System: 1. Download APP : CELLULAR-Z or CELLULAR-PRO 2. Displays individual content after "NR-BAND" /"Band/BandWidth DL" Excellent service: 1. Free pre-sale unlimited consulting 2. Lifetime free after-service 3. Free 30-day replacement or free return return return 4. Receive parcels in 1-2 days and ship fast by point detail Installation Instructions: 1. Locate the strongest location of the outdoor2.Place the outdoor antenna in the strongest location of the signal, ensure there is no obstructions in the front, and point to the direction of the signal tower. 3.Connect the cable to the outdoor antenna and the cable inside through the outdoor4.Pull the cable to the longest distance 5.Connect the cable to the signal partners BTS terminal of your mobile phone 6.Place the amplifier in the outside antenna in the horizontal and vertical distance 7. Antenna and Cell Phone Signal Partner Connecting MS terminal: 8. The interior antenna refers to the area you want to raise the signal. Product received after purchase: 1 x outdoor antenna, 1 x 15 m cable, 1 x signal partner, 1 x indoor antenna, 1 x 5 V power supply, 1 x Japanese instruction manual (English language not guaranteed).