Product name: 2.4 G wireless keyboard; 

number of keyboard keys: 101; 

keyboard key life: ≥8 million times; 

keyboard character: Silk Screen; 

keyboard size: keyboard (432.3 × 145.2.41 mm) ; 

armrest (416 × 102.3 × 28.5 mm) ; 

Keyboard weight: 598G ± 20(keyboard)173.5 g (armrest)(using 550mah alkaline battery 2 PCS, working current of 3AM)