Supports power supply via USB cable or 2 × AAA batteries (batteries not included)

They will be very happy

Abdominal massage: The infrared heating massage function can effectively warm the stomach and reduce abdominal pain during the physiological period

choose the larger size

Wood Moisture Detector – Digital Moisture Meter for Wood, Timber & Building Materials Kitchen and Dining Supports power supply via USBWood Moisture Measurement Range: 2%40%Probe Insertion and Removal Test Cycles: 1000 timesAmbient Temperature Correction Range: 10C to 60CDisplay: 3 digit displayDisplay Type (HTN): Single DisplayRefresh Rate: 2 times secondOperating Temperature: 0C40CPower Supply: 3 1. 5V AAA batteries (No. 7 batteries)