1)credit card shaped, small size,can be put in pocket& wallet 3) material: ABS 4) LED bulb, saving energy product size: 8.5cmx5.3cmx0.3cmbody color: white,red, blue,greenlight: yellow, whitepower: 0.01Wvoltage: 3Vwith 1pc button batterypacking:1pc/color box800pcs/ctnctn size: 40cmx27.5cmx33cmG.W/ctn: 20kgs/ctn