Backlit Keypad 5 backlit buttons with proximity sensor Battery Life 4 months on a single charge Battery Type 18650 rechargeable lithium-ion, 3.7v 2200 mAh Construction 16-gauge steel Fitment Fits full-size handguns up to 8.875" in overall length with optics Handgun Capacity Fits 1 handgun of up to 8.875" in overall length + 1 spare magazine Nano Key 2.0 Compatible Yes Pin Code Length 4-8 Digits Exterior Product Dimensions 11.25" H x 9.1" W x 2.6" L Interior Product Dimensions 8.875" H x 5.625" W x 2" L Weight 7.4 LB