Features 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