Scythe TM02-WH Kama Thermo Thermometer Dimensions: 1.88 x 1.11 x 0.66 inch 47.8 x 28.3 x 16.7mm Product Material Resin Back-Light Blue(Illuminated when 4-pin power source is used) Power Source (2-Way) Button Cell Battery (Type: LR44) / 4-Pin Power