Check the listing for details. Retevis MB3A 40-Channel AM/FM CB Radio Kit Mobile Radio For Trucker With Antenna. Color: Black, Condition: New. Listed at 99.99 USD. The MB3A is ideal for CB users who are looking for an affordable CB radio with a Miniature experience.It is equipped with AM/FM,12/24V Power Voltage,Clear sound quality,EMG 9/19,Heat dissipation,VOX.Ideal for industries and transportation drivers who need an efficient way to coordinate with their team. Dual-Mode AM/FM: With simultaneous access to both AM and FM channels, the RETEVIS MB3A radio can transmit and receive long-range communications while also having clear close-range communication capabilities. Get clear reception, the strongest transmissions. VOX Hands-Free: Retevis MB3A CB Radio is equipped with a nine-level VOX function. The higher the level, the louder the sound required to activate the VOX function. Users can set the best VOX level according to their own environment.