Compared to the prison cellphone silencer P-US-T80 with the same performance, PJ800 has a super large output power of 800W and a larger coverage area (4-5 times that of P-US-T80). But if your budget is limited, you might as well spend a few more minutes to check out P-US-T80.


https://www.thejammerblocker.com/pj800-outdoor-waterproof-smart-prison-jamming-device/