Delta Faucet 552TLF Tesla Single Handle Bathroom Faucet with Touch2O.xt Technology, Chrome Operates manually with the handle, with the tap touch2o functionality or by placing your hands within the 4 in. sensing field around the faucet Battery operated (6 aa included) for up to 2 year battery life or 6 c (not included) for up to 5 year battery life Battery box can be mounted to cabinet with included mounting hardware Optional a/c adapter Ep73954 may be ordered separately Water sense certification promotes water conservation Metal