HamGeek MCHF V0.6.3 HF SDR Transceiver QRP Transceiver Amateur Ham Radio (Transparent Buttons) Description: This is an SDR HF QRP transceiver that has been popular all over the world since its launch and has at least 30,000 users so far. Its advantages are: small and portable, cost-effective, full-featured, and direct selection of software radio circuit models. For electronics enthusiasts who like DIY and hardware, this is a very good hands-on tool. It can be used to familiarize yourself with the working principle of amateur radio transceivers; for software enthusiasts who write code programming and code farmers, you can also use this hardware to modify the source code by yourself, add or reduce some functions, and give full play to your code farmers. With technical ability, you can modify and upgrade the software of this machine at will. For college students studying electronic technology, it can be used to test their own learning level. And QRP communication enthusiasts can use the assembled kit for various outdoor QRP communication, especially digital communication using PSK31, RTTY and JT65. For emergency communication, it is a small and portable emergency communication equipment. Frequency Stability: ±1.5ppm (5 minutes on), -10°C to +60°C (standard); ±0.5ppm (5 minutes on), -10°C to +60°C (TCXO-M) – Working voltage: 915V DC – Working current: Receiving: 410MA-440MA (maximum display brightness). Minimum LCD brightness can be reduced by 40-60MA. After hardware improvement, it will drop by 50%-80%; about 60MA after shutdown, and 3-5MA after power amplifier driver level improvement. Transmit: 3A (FULL); 1.5A (5W) – Transmitting frequency band: 3.5Mhzï½? 3.9MHz, 5351.5-5366.5 kHz, 7MHzï½? 7.3MHz, 10.1 MHzï½? 10.150 MHz, 14MHzï½? 14.350MHz, 18.068 MHzï½? 21.450MHz, 24.890MHzï½? 24.990 MHz, and 28MHzï½? Usually it costs about 30USD-50USD. Thanks for your understanding. If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days.