Feature: 1. THE WHOLE EFFECT: Choose for CXA1538M for CAX1622P program; for CXA1538M has excellent signal to noise ratio and stereo demodulation performance. 2. SWITCHING MODE, CERAMIC FILTER: The motherboard supports automatic switching and manual switching mode; the selection of excellent 455 ceramic filter, to protect the AM IF signal passband. 3. AUTOMATIC SWITCHING: The sound power amplifier CXA622P automatically switches to the radio band through the headphone jack, AM band without headphone cable or FM antenna, FM band when accessed. 4. EASY TO OPERATE: Equipped with a transistor and IC hybrid kit, it allows hobbyists and DIYers alike to build their own AM radio receiver with detailed diagrams and instructions. 5. BATTERY POWERED, COMPACT SIZE: The radio kit runs on 3 AAA batteries (batteries not included). Small and compact, easy to install and operate. Specification: Item Type: DIY Radio Kit Material: PCB Support: AM FM Voltage: 4.5V Battery Type: 3 x AAA Battery (Not Included). Package List: 1 x Radio Kit 1 x Antenna 1 x Screw Pack 1 x Instruction Manual