Screen size
Impulse 4GWinner: 3.8"+61%
Watch Buds 21.5"
Quick verdict
Impulse 4G leads the measured specs 8-5.
Measured wins
Impulse 4G
8
spec wins
Overall winner
Ties
1
equal specs
Watch Buds 2
5
spec wins
Screen size
Technology
Impulse 4G
GSM / HSPA
Watch Buds 2
No cellular connectivity
2G bands
Impulse 4G
GSM 850 / 900 / 1800 / 1900
Watch Buds 2
N/A
3G bands
Impulse 4G
HSDPA 850 / 1900 / 2100
Watch Buds 2
N/A
Speed
Impulse 4G
HSPA 14.4/5.76 Mbps
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
SD card
Stereo speakers
Watch Buds 2
No
4G bands
Impulse 4G
-
Watch Buds 2
N/A
GPRS
Impulse 4G
-
Watch Buds 2
No
EDGE
Impulse 4G
-
Watch Buds 2
No
Announced
Impulse 4G
2011, September. Released 2011, September
Watch Buds 2
2026, April 20
Status
Impulse 4G
Discontinued
Watch Buds 2
Available. Released 2026, April 20
Dimensions
Impulse 4G
120 x 65 x 11.6 mm (4.72 x 2.56 x 0.46 in)
Watch Buds 2
47 x 47 x 14.7 mm (1.85 x 1.85 x 0.58 in)
Weight
Impulse 4G
130 g (4.59 oz)
Watch Buds 2
54.5 g (1.90 oz)
SIM
Impulse 4G
Mini-SIM
Watch Buds 2
No
Build
Impulse 4G
-
Watch Buds 2
Titanium alloy frame, glass-fiber reinforced plastic back
Other
Impulse 4G
-
Watch Buds 2
Built-in wireless earbuds housed beneath the display; charging from the watch Compatible with standard 22mm straps
Type
Impulse 4G
TFT
Watch Buds 2
LTPO AMOLED, 3000 nits (peak)
Size
Impulse 4G
3.8 inches, 41.1 cm2 (~52.7% screen-to-body ratio)
Watch Buds 2
1.5 inches
Resolution
Impulse 4G
480 x 800 pixels, 5:3 ratio (~246 ppi density)
Watch Buds 2
466 x 466 pixels (~310 ppi density)
OS
Impulse 4G
Android 2.2 (Froyo)
Watch Buds 2
HarmonyOS
Chipset
Impulse 4G
Qualcomm MSM7230
Watch Buds 2
-
CPU
Impulse 4G
800 MHz Scorpion
Watch Buds 2
-
GPU
Impulse 4G
Adreno 205
Watch Buds 2
-
Card slot
Impulse 4G
microSDHC (dedicated slot)
Watch Buds 2
No
Internal
Impulse 4G
512MB RAM
Watch Buds 2
-
Single
Impulse 4G
5 MP, AF
Watch Buds 2
-
Features
Impulse 4G
LED flash
Watch Buds 2
-
Video
Impulse 4G
720p@30fps
Watch Buds 2
-
Other
Impulse 4G
No
Watch Buds 2
-
Loudspeaker
Impulse 4G
Yes
Watch Buds 2
No
3.5mm jack
Impulse 4G
Yes
Watch Buds 2
No
WLAN
Impulse 4G
Wi-Fi 802.11 b/g/n
Watch Buds 2
No
Bluetooth
Impulse 4G
2.1, A2DP, EDR
Watch Buds 2
5.2, A2DP, LE
Positioning
Impulse 4G
GPS, A-GPS
Watch Buds 2
GPS, GLONASS, GALILEO, BDS
Radio
Impulse 4G
No
Watch Buds 2
No
USB
Impulse 4G
microUSB 2.0
Watch Buds 2
No
NFC
Impulse 4G
-
Watch Buds 2
Yes
Sensors
Impulse 4G
Accelerometer, proximity, compass
Watch Buds 2
Accelerometer, gyro, heart rate, SpO2
Other
Impulse 4G
MP3/WAV/eAAC+ player MP4/H.264 player Organizer Document viewer Photo viewer/editor Voice memo/dial Predictive text input
Watch Buds 2
-
Type
Impulse 4G
Removable Li-Ion 1500 mAh battery
Watch Buds 2
Li-Ion 410 mAh
Stand-by
Impulse 4G
Up to 240 h
Watch Buds 2
-
Talk time
Impulse 4G
Up to 4 h
Watch Buds 2
-
Charging
Impulse 4G
-
Watch Buds 2
Wireless
Colors
Impulse 4G
Black
Watch Buds 2
Black, Silver
Price
Impulse 4G
About 80 EUR
Watch Buds 2
About 440 EUR
Models
Impulse 4G
-
Watch Buds 2
LBA-B19
Other
Impulse 4G
-
Watch Buds 2
No