It is the Stainless Steel waterproof LED weighing indicator. (And the rightmost one is the whole scale with the indicator.) It is so shockproof and acidproof that can be used in production line.

Display                      1inch LED   
Accumulating Function        YES            
WATERPROOFLEVEL              IP68          
Authentication                      CE,RoHS  
Accuracy                                ¢ó        
WorkingTemperature           -10~+40   
Power supply       6V4Ah built-in sealed lead-acid battery £¨With Special-purpose charger £©
Size                                  212X136X105mm                                                               
Max.ISN                            500000/eachtime                     
Bridge voltage loadcell      DC5V    
Qtys of loadcell                 4 pcs 350¦¸ loadcell£¬four wires
Voltage indicator               3 Levels (High, Middle, Low)            
Mainboard Sealed Method      Sealed in a box by silica gel         
Auto-Shutdown Time          10 mins          
Auto-Zero Tracing Range     0 - 4 graduations     
Fix Value Alarm                  Available           
Counting                           Available
Overload Protection           Available 
RS232                               Available      
Technical Specifications: 
MODEL                            15(30,75)       150     300    600      1500           3000
Max. Capacity      15kg(30kg,75kg)   150kg   300kg   600kg    500kg      3000kg      
Mini. Capacity      100g(200g,400g)   1kg       2kg        4kg       10kg        20kg 
VerificationScaleInterva 5g(10g,20g)  50g    100g        200g 500g       1000g              Actual Scale Interval(d)   0.5g(1g,2g)     5g    10g           20g     50g    100g
MAX. TARE           15kg(30kg,75kg)     150kg   300kg     600kg   1500kg    3000kg