Screen size
U7510Winner: 2.8"+35%
Watch Fit 41.8"
Quick verdict
Watch Fit 4 leads the measured specs 9-3.
Measured wins
U7510
3
spec wins
Ties
2
equal specs
Watch Fit 4
9
spec wins
Overall winner
Screen size
Technology
U7510
GSM / HSPA
Watch Fit 4
No cellular connectivity
2G bands
U7510
GSM 900 / 1800 / 1900
Watch Fit 4
N/A
3G bands
U7510
HSDPA 2100
Watch Fit 4
N/A
Speed
U7510
HSPA 3.6/0.384 Mbps
Watch Fit 4
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
Stereo speakers
No
4G bands
U7510
-
Watch Fit 4
N/A
GPRS
U7510
-
Watch Fit 4
No
EDGE
U7510
-
Watch Fit 4
No
Announced
U7510
2009, September. Released 2009, November
Watch Fit 4
2025, May 15
Status
U7510
Discontinued
Watch Fit 4
Available. Released 2025, May 26
Dimensions
U7510
108 x 56 x 13.8 mm (4.25 x 2.20 x 0.54 in)
Watch Fit 4
43 x 38 x 9.5 mm (1.69 x 1.50 x 0.37 in)
Weight
U7510
-
Watch Fit 4
27 g (0.95 oz)
SIM
U7510
Mini-SIM
Watch Fit 4
No
Build
U7510
-
Watch Fit 4
Glass front, aluminum alloy frame, plastic back
Other
U7510
-
Watch Fit 4
5 ATM water resistant
Type
U7510
TFT, 256K colors
Watch Fit 4
AMOLED, 2000 nits (peak)
Size
U7510
2.8 inches, 24.3 cm2 (~40.1% screen-to-body ratio)
Watch Fit 4
1.82 inches
Resolution
U7510
240 x 320 pixels, 4:3 ratio (~143 ppi density)
Watch Fit 4
480 x 408 pixels (~347 ppi density)
Card slot
U7510
microSDHC (dedicated slot)
Watch Fit 4
No
Phonebook
U7510
1000 entries, Photocall
Watch Fit 4
No
Call records
U7510
30 received, dialed and missed calls
Watch Fit 4
No
Internal
U7510
100MB
Watch Fit 4
Unspecified
Single
U7510
2 MP
Watch Fit 4
-
Video
U7510
Yes
Watch Fit 4
-
Single
U7510
Yes
Watch Fit 4
-
Video
U7510
Watch Fit 4
-
Loudspeaker
U7510
Yes
Watch Fit 4
Yes
3.5mm jack
U7510
No
Watch Fit 4
No
WLAN
U7510
No
Watch Fit 4
No
Bluetooth
U7510
2.0, A2DP
Watch Fit 4
5.2, LE
Positioning
U7510
No
Watch Fit 4
GPS (L1+L5), GALILEO (E1+E5a), QZSS (L1+L5), BDS (B1l+B1C), GLONASS
Radio
U7510
Stereo FM radio, RDS
Watch Fit 4
No
USB
U7510
Proprietary
Watch Fit 4
No
NFC
U7510
-
Watch Fit 4
Yes (gray model only)
Sensors
U7510
Watch Fit 4
Accelerometer, gyro, heart rate, SpO2, compass, barometer
Messaging
U7510
SMS, MMS, Email
Watch Fit 4
Email, IM
Browser
U7510
WAP 2.0 / xHTML
Watch Fit 4
-
Games
U7510
Yes
Watch Fit 4
No
Java
U7510
Yes, MIDP 2.1
Watch Fit 4
No
Other
U7510
MP3/AAC+ player MP4/H.263 player Skype and MSN integration Voice memo Predictive text input
Watch Fit 4
Pulse wave arrhythmia analysis
Type
U7510
Removable Li-Ion battery
Watch Fit 4
Li-Ion 400 mAh
Stand-by
U7510
Up to 380 h
Watch Fit 4
-
Talk time
U7510
Up to 4 h
Watch Fit 4
-
Charging
U7510
-
Watch Fit 4
5W wireless
Colors
U7510
Blue, Violet
Watch Fit 4
Black, Silver
Price
U7510
About 120 EUR
Watch Fit 4
$ 121.00 / € 104.76
Models
U7510
-
Watch Fit 4
SYA-B19
Other
U7510
-
Watch Fit 4
No