◇◇Technical Parameters1、Board facing angle: ≥82 inches, display ratio 4:3;2、Touch sensing method: optical image sensing technology is a touch fra
4K Central Controller HS-350D
Product details1.You can add, subtract, mute the output sound,with sound switching and volume control function, 2. HDMI：3 in 2 out，VGA：3 in 2 out