Features: Brand new and high quality Adopt the integrated cutting technology of aluminum case, spray fine sand for oxidation, which has a beautiful appearance and more texture, and the aluminum knob is fully mechanical. It supports double antenna input 1.10D receiver, optimizes the filter and circuit, especially the mediumwave part, and the performances is improved to a certain extent, attenuated to 30db, and the shortwaves sensitivity is improved, so that a better and more stable signal can be obtained. The receiving frequencies are 50kHz to 250MHz and 400MHz to 2GHz. If you want to get better results when receiving shortwaves frequency ranges M, USB,LSB, it is recommended to use a smallloop active outdoor antenna Built-in 5000Mah 3.7V rechargeable battery, USB C interfaces, long battery life, once fully charged, it can be used for 15 hours, which is very safe to use. It has the functions of variable filter width, adaptive noise suppressor, threshold noise suppressor, noise suppressor, equalizers and so on. Specifications: Material:Aluminium Alloy Size:Approx.140x94x30mm/5.51x3.7x1.18inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Malachite Receiver