Wireless outdoor temperature (F./C.). Monitors indoor temperature (F./C.). Records minimum/maximum temperature with time and date of recording. Wall hanging or free standing. Detachable stand included. Can receive up to 3 sensors. Time display (manual setting). 12/24 hour time display. 1 year limited warranty - wireless outdoor temperature range: -21.8 F. to +156.2 F. Indoor temperature range: 32 F. to 140 F. Temperature accuracy: +/- 1.5 F. Transmission range: Up to 80'. Transmission frequency: 433.92 MHz. Receiver: 2 ''AA'' alkaline batteries (not included). Wireless sensor: 2 ''AAA'' alkaline batteries (not included). Receiver dimensions: 4.25'' H. x 2.75'' W. x 1'' D. Sensor dimensions: 2.75'' H. x 2.5'' W. x 8'' D.