New alloy luminous diamond pen. [Rose gold Rose Red Rose Blue] the total weight of the new alloy luminous diamond pen with no.7 battery is about 21.5g. The weight without battery is about 10.5g. No. 7 battery weighs about 11.5 grams. Push type lighting switch. Protect eyesight. Increase the speed by spot drill. Press the lighting method more quickly [press with use, easy convenient, lighting auxiliary function]]