Comparison Caterpillar S61 and ASUS ZenFone 4 Pro ZS551KL 128GB

Show: all features only different features	Caterpillar S61	ASUS ZenFone 4 Pro ZS551KL 128GB
General characteristics
Type	smartphone	smartphone
OS version	Android 8.0	Android 7.0
Case type	classic	classic
Construction	waterproof shockproof case	—
Control	mechanical keyboard	mechanical sensor keyboard
SIM-card type	nano SIM	nano SIM
SIM-card amount	2	2
Multi SIM mode	alternate	alternate
Weight	250 grams (100%)	175 grams (70%)
Width	78 mm (100%)	75.6 mm (97%)
Height	163 mm (100%)	156.9 mm (96%)
Thickness	13 mm (100%)	7.6 mm (58%)
Display
Diagonal	5.2" (95%)	5.5" (100%)
Screen size	1920x1080	1920x1080
Number of pixels per inch (PPI)	424 (100%)	401 (95%)
Screen type	colored IPS sensor	colored AMOLED sensor
Sensor screen type	multitouch capacitive	multitouch capacitive
Aspect Ratio	16:9	16:9
Automatic display rotation
Scratch-resistant glass		—
Multimedia features
Rear camera	16 MP	double 12 16 MP
Flash	rear LED	rear LED
Rear camera functions	autofocus	autofocus laser optical stabilization optical Zoom 2x
Video Recording
Video resolution max	3840x2160	3840x2160
Max. frame rate of video	30 fps	30 fps
Front camera	8 megapixels	8 megapixels
Audio	MP3 AAC WAV WMA FM-radio	MP3 AAC WAV WMA FM-radio
Headphone jack	3.5 mm	3.5 mm
Rear camera diaphragm	—	F 1.7
Connectivity
Standard	GSM 900/1800/1900 3G 4G LTE VoLTE	GSM 900/1800/1900 3G 4G LTE LTE-A Cat. 12
Interfaces	Wi-Fi 802.11ac Bluetooth 5.0 USB NFC	Wi-Fi 802.11ac Wi-Fi Direct Bluetooth 5.0 USB NFC
Satellite navigation	GPS BeiDou	GPS BeiDou
A-GPS system	—
Storage and processor
CPU	Qualcomm Snapdragon 630 2200 MHz	Qualcomm Snapdragon 835 MSM8998
Processor cores number	8	8
Video processor	Adreno 508	Adreno 540
Built-in memory	64 GB (50%)	128 GB (100%)
Amount of RAM	4 GB (67%)	6 GB (100%)
Memory card slot		yes volume of up to 2048 GB SIM-card compatable
Power supply
Battery type	Li-Ion	—
Battery capacity	4500 mA⋅h (100%)	3600 mA⋅h (80%)
Battery	non-removable	non-removable
Talk time	35 hours	—
Standby time	888 hours	—
Connector type for charging	USB Type-C	USB Type-C
Quick charging function	yes Qualcomm Quick Charge 4	—
Other functions
Control	mechanical keyboard	mechanical sensor keyboard
Airplane mode
Sensors	illumination sensor approaching sensor compass fingerprint scanner	illumination sensor approaching sensor Hall sensor gyroscope compass fingerprint scanner
Flashlight
USB-host		—