Features PORTABLE DESIGN: Includes 4pcs mini ring transceivers, lightweight and portable, can be placed in a pocket, suitable for home or travel use. SIGNAL IMPROVEMENT: It can enhance the signal and provide you with excellent reception, improving your shortwave listening performance. APPLICABLE RADIO: There are 2 functions in one antenna that can improve the reception effect of shortwave radio, suitable for all FM SW radios. EASY ASSEMBLY: This ring antenna is easy to assemble, no adjustment required, making it suitable for broadcasting with limited space. PCB MATERIAL: These short wave loop transceivers are made of excellent PCB material, with stable performance and long service life. Specification: Item Type: Transceiver Material: PCB Package List:4 x Transceiver Package List 4 x Transceiver