Digital temperature meter, with wireless sensors, is suitable for outdoor or indoor use, like living room, bedroom, baby room, office, wine cellar, greenhouse, basement, etc.--monitoring three temperature(one by temperature meter, two by sensors), grasping environment changes in real time. Features: THREE TEMPERATURE MONITOR: The temperature meter, made of solid durable ABS housing, comes with 2 sensors(signal distance: 100m/328ft), can simultaneously monitor temperature of 3 places. HIGH ACCURACY: Digital temperature monitor, built-in smart sensor, features wide temp measure range, precise monitoring, 10s refresh speed, providing latest changes of environment. LARGE LCD DISPLAY: Large screen shows real temperature data values in a big font, easy to read, battery status, temperature trend icon, maximum/minimum temp. MAX/MIN RECORD & ALARM: It has max & min temp value memory, icon & sound alarm at temperature over setup value, or °F switchable with press on button. EASY INSTALLMENT: Sensor equips with back clip for easy installing; temperature meter, with hanging hole, magnetic design & bracket, allows hassle-free wall mount, attaching to refrigerator, placing on table. Specifications: Material: plastic + electronic components Color: white Type: temperature meter & 1 sensor / temperature meter & 2 sensor (optional) Indoor temperature range: 0~50 (32~122) Outdoor temperature range: -40~60 (-40~140) Accuracy: ±1.0 Indoor temperature refresh time: 10s Outdoor temperature refresh time: 60s Sensor power supply: 2 * AA battery (not included) Temperature meter power supply: 2 * AAA battery (not included) Coverage range: up to 100 meters Sensor dimension: 38*33*106mm / 1.49*1.29*4.17in Temperature meter dimension: 95*20*85mm / 3.74*0.78*3.34in Net weight:178g / 6.27oz Package size: 95*63*115mm / 3.74*2.48*4.52in Package weight:220g / 7.76oz Note: Temperature monitor set only, other accessories in the pictures are not included. Due to manual measurement, there may be deviation, please in kind prevail. Due to lighting or other reasons, the picture and material object may slightly differ. Packing List: 1 * Temperature Gauge 2 * Sensor 1 * User Manual