| Composition | KENWOOD DDX4021BT | JVC KD-R426 |
| Tuner | has a digital | has a digital |
| CD players | yes | yes |
| MP3-players | yes | yes |
| DVD-player | yes | no |
| Blu-ray player | no | no |
| Amplifier | yes | yes |
| Equalizer | yes | yes |
| Navigator | no | no |
| TV tuner | no | no |
| General characteristics | KENWOOD DDX4021BT | JVC KD-R426 |
| Maximum power | | 4x50 W |
| Nominal and maximum power | 4x30 W/4x50 W | |
| Size | 2 DIN | 1 DIN |
| CD-changer interface is | no | no |
| Color | black | black |
| Supported carriers and formats | KENWOOD DDX4021BT | JVC KD-R426 |
| Formats | CD-Audio, DVD-Video, MP3, MPEG4, DivX, WMA, AAC, JPEG | CD Audio, MP3, WMA |
| Media | CD-R, CD-RW, VCD, DVD R, DVD RW, iPod | CD-R, CD-RW |
| Decoder | Dolby Digital, Dolby Pro Logic II, DTS | |
| Standards support | PAL, NTSC | |
| Display | KENWOOD DDX4021BT | JVC KD-R426 |
| Display type | multi-color, touch | monochrome |
| Display dimensions | 800 x 480 pixels, 136 x 72 mm | |
| Display diagonal | 6.1 inch | |
| Display format | 16:9 | |
| Angle adjustment panel | yes | |
| Adjust backlight brightness | yes | |
| Adjusting the brightness of the display | yes, manual | |
| Management | KENWOOD DDX4021BT | JVC KD-R426 |
| Infrared remote | yes | yes |
| Joystick on the steering wheel | it is possible to connect | no |
| Search for a folder/file | | yes |
| Auto plants | yes | yes |
| Pause when speaking on the phone | yes | |
| Interfaces | KENWOOD DDX4021BT | JVC KD-R426 |
| Inputs | video composite video USB | USB |
| Audio input on the front panel | yes | yes |
| Outputs | PreAmp front, PreAmp rear, and subwoofer PreAmp, composite video | Subwoofer PreAmp |
| Bluetooth Support | yes | no |
| Front panel USB | yes | |
| Support A2DP profile | yes | |
| Connecting the ISO | yes | |
| Gold-plated connectors | yes | |
| Supports rear-view camera | yes | |
| Protection | KENWOOD DDX4021BT | JVC KD-R426 |
| Detachable panel | | yes |
| Tuner | KENWOOD DDX4021BT | JVC KD-R426 |
| Support band | FM, MW, LW | FM, MW |
| Tuner with long reception | yes | yes |
| Number of preset FM/AM | 18 / 3 | 18 / 6 |
| RDS | RDS RDS/EON, RDS, PTY | |
| Switching stereo/mono | yes | |
| Additional information | KENWOOD DDX4021BT | JVC KD-R426 |
| Adjusting the voice | yes | yes |
| The number of bit DAC | 24 | 24 |
| ID3 tag support | yes | yes |
| CD-text | yes | yes |
| Tone compensation | yes | yes |
| Dimensions (WxHxD) | 182x112x163 mm | 182x52x160 mm |
| The number of bands equalizer | 5 | |
| Weight | 2550 g | |
