Cell phone jammer typically cost between $150 and $1,000, while older models cost around $100. The price of low power is around $120, the price of medium power is around $400, the price of high power is over $1,000. The price of the built-in phone signal shield will be slightly lower than $50, because the shell of the built-in phone signal shield is relatively low in cost of plastic, and the shell of the external phone signal shield is aluminum alloy. If you need to purchase mobile phone signal shielding device, you should still purchase external mobile phone signal shielding device. As we all know, you get what you pay for. External mobile phone signal shielding device has large antenna gain, good shielding effect, stable performance, good heat dissipation effect, and can work 24 hours without stop.
There are many mobile phone signal blocker brands, each brand with different prices of motherboards are also different, different power prices are different. Want to choose well-known brand, also want to choose cost-effective, so spend the least money to buy the best mobile phone signal blocker, mind you consult a few more to do a comparison.