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INTERNET RADIOS
SG Model DDR-66BT DDR-75BT WFR-28BT WFR-39 WFT-4 SB-100
FM Frequency (MHz) 87.5–108 87.5–108 87.5–108 87.5–108 87.5–108 87.5–108
FM RDS/BDS PS / PTY / RT / CT PS / PTY / RT / CT PS / PTY / RT / CT PS / PTY / RT / CT PS / PTY / RT / CT PS / PTY / RT / CT / PI
TUNER
DAB / DAB+ Channel Block 5A–13F 5A–13F 5A–13F 5A–13F 5A–13F 5A–13F
Internet Radio O O O O O O
Memory Presets 30 (10 FM / 10 DAB / 10 Internet Radio) 30 (10 FM / 10 DAB / 10 Internet Radio) 15 (5 FM / 5 DAB / 5 Internet Radio) 448 (99 FM / 99 DAB / 250 Internet Radio) 20 (10 FM+DAB / 10 Internet Radio) 30 (10 FM / 10 DAB / 10 Internet Radio)
TUNING Rotary Tuning - - O - O -
Auto Tuning System / Seek Tuning O O O O O O
Bluetooth O O O - O O
Aux-in O O O - O O
Streaming Service Spotify / Amazon Music / Deezer Spotify / Amazon Music / Deezer Spotify Spotify / Amazon Music / Deezer / Napster / Qobuz / Tidal Spotify / Amazon Music / Deezer Spotify
Podcast O O O O O O
MEDIA
CD / CD-R / CD-RW O O - - - -
SD Card Audio Playback O O - - - -
USB Audio Playback O O - - - -
UPnP Audio Playback - - - O - O
Version 5 5 5 - 5 3
Codec SBC / AAC SBC / AAC SBC / AAC - SBC (Rx/Tx) / AAC (Rx) / APTX (Tx) / APTX Adaptive (Tx) SBC / AAC
NFC O O - - - O
BLUETOOTH
AVRCP Play / Pause / Previous / Next / Rewind / Forward Play / Pause / Previous / Next / Rewind / Forward Play / Pause / Previous / Next / Rewind / Forward - Play / Pause / Previous / Next Play / Pause / Previous / Next / Rewind / Forward
A2DP O O O - O O
Tx - - - - O -
WiFi IEEE 802.11 a/b/g/n IEEE 802.11 b/g/n IEEE 802.11 a/b/g/n IEEE 802.11 b/g/n IEEE 802.11 a/b/g/n IEEE 802.11 b/g/n
INTERNET
Ethernet O O - - O O
Real Time Radio Radio Radio / Network Radio / Network Radio / Network Radio / Network
Alarm 2 Sets 2 Sets 2 Sets - 2 Sets 2 Sets
Timer - - - - - -
CLOCK HWS (Humane Wake System) O O O - O -
Snooze O O O - O O
Sleep Timer O O O O O O
Auto Shut Off O O - O - -
Type TFT LCD TFT LCD TFT LCD TFT LCD TFT LCD TFT LCD
Size (mm) 64.8 x 48.6 71 x 51.6 49.8 x 37.6 49 x 36.7 84.1 x 56.3 64.8 x 48.6
Size (in) 2.55 x 1.91 2.8 x 2.03 1.96 x 1.48 1.93 x 1.45 3.31 x 2.22 2.55 x 1.91
Graphic / Character Type Graphic Graphic Graphic Graphic Graphic Graphic
DISPLAY Backlight O O O O O O
Dimmer O O - O O O
Battery Level Indicator - - - O - -
LED Low Battery Indicator - - O O - -
LED Charging Indicator - - O O - -
Speaker Size 76mm / 3" x 2 76mm / 3" x 2 + 101mm / 4" x 2 76mm / 3" 57mm / 2.25" - 57mm / 2.25" x 2 + 89mm / 3.5" x 2
Speaker Impedance 8 ohm x 2 8 ohm 4 ohm 8 ohm x 2 - 8 ohm x 2 + 8 ohm x 2
Speaker Output (AC / DC Powered) 7W x 2 6W x 2 + 18W 2.5W 1W - 4W x 2 + 18W
Speaker Output (Battery Powered) - - 2.5W 0.6W - -
Speaker Output (Max) 12W 10W x 2 + 25W 3W 2W - 15W x 2 + 24W x 2
Amplifier Class D Class D Class AB Class D - Class D
AUDIO
Earphones 3mW x 2 1mW x 2 1mW x 2 0.9mW x 2 - -
Stereo Speaker / Earphones Speaker / Earphones Earphones Earphones Audio out Speaker
Treble / Bass Control O O O O - O
DRC (Dynamic Range Control) for DAB O O O - O O
EQ (Mode) Normal,Flat,Jazz,Rock,Movie,Classic,Pop,News,My EQ Normal,Movie,Music,Speech,My EQ,Concert Flat,Rock,Pop,Jazz,Classic,News,Movie,My EQ Normal,Flat,Jazz,Rock,Soundtracks,Classic,Pop,News,My EQ - Concert,Movie,Music,My EQ,Normal,Speech
Loudness Switchable Always on Switchable Switchable - Always on
Recording to SD Card / USB Hard Drive O O - - - -
OTHER Software Upgradability Internet Internet Internet Internet Internet Internet
FEATURE External FM Antenna Telescopic Antenna - Telescopic Antenna Telescopic Antenna Telescopic Antenna -
Other (Emergency (EAS) / - Mobile App Control - - - -
Aux-in (3.5mm) O O O - O -
Line-out / REC-out (3.5mm) O O O - - -
Earphone (3.5mm) O O O O - -
SD Card Slot O O - - - -
USB Socket Type USB Type-A USB Type-A - USB Type-C - -
USB Socket DC In - - - O - -
I/O USB Socket DC Out O - - - - -
SOCKET
USB Socket Audio Playback O O - - - -
USB Socket Audio Recording O O - - - -
USB Socket Software Update - - - - - -
External Antenna Port - - - - - F Type FM Antenna Terminal
Ethernet RJ45 Port O O - - O O
Others - S/PDIF Out - - Coaxial In,Coaxial Out,Coaxial Digital Out,S/PDIF In,S/PDIF Out S/PDIF In,S/PDIF Out,RCA In,Subwoofer Out
AC / DC AC-in 100-240V AC-in 100-240V DC-in 9V/1.2A DC-in 5V/2.4A AC-in 100-240V AC-in 100-240V
POWER Battery - - 4 x D 1.5V 18650 Li-Ion Battery 3.6V/2600mAh - -
SUPPLY Battery Life (Speaker playback time on built-in battery) - - - 7 hr - -
Battery Rechargeability - - O O - -
AC Cord O O - - O O
Power Adapter - - O - - -
Charging Cable - - - USB-A to USB-C - -
ACCESSORIES
Remote Controller O O - - O O
External Antenna - - - - - FM Dipole Antenna
Others - - - - - Wall Mounting Hardware
Width (mm) 356 420.6 237 166 430 900.3
Height (mm) 129.6 199.6 137.3 108 75.5 117.3
Depth (mm) 251.7 282.9 64.4 38.7 305.6 174
Weight (g) 4,116 10,301 865.5 405 2,595 6,663
DIMENSIONS
Width (inch) 14.02 16.56 9.33 6.54 16.93 35.44
Height (inch) 5.1 7.86 5.41 4.25 2.97 4.62
Depth (inch) 9.91 11.14 2.54 1.52 12.03 6.85
Weight (lb) 9.07 22.71 1.91 0.89 5.72 14.68
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