Thermometer hygrometer same model presented, easy to read with large display. Good values displayed in comparison with a precision thermometer hygrometer, temperature differences of 0.2 degree in the range 19 ° to 24 ° and 1% RH in the range 50% to 60% being tested. Accuracy is very surprising for a camera of this price, hope that reliability is the rendezvous. Quality plastic materials consistent with price. Works with LR3 AAA battery not included. Very fast delivery in 10 days.