:  9-Volt battery (not included)Features of Sonin Multi Measure Electronic Distance Tool 10300 ... Sonin's Multi Measure Combo Pro Electronic Distance Measure Tool 10300 works by sending out narrow ... Combo Pro Electronic Distance Tool 10300: Size:  Receiver: 5 7/8 x 2 7/8 x 1 3/4 inches ... Target: 4 3/4 x 3 x 1 1/16 inchesWeight:  Receiver: 6.2 oz (without battery) Target: 4.0 oz ... (without battery)Accuracy:  Single Unit Mode: 99.5% +/- 1/4 inch Dual Unit Mode: 99.5% +/- ... ftDisplay:  LCDUnits:   Ft/In, M/Cm's, Decimal Feet or Yards Battery ... recallAutomatic internal temperature compensationAuto shut-off 7 minutes after last useLow Battery...