Anker 30W 4-Port Aluminum USB Desktop Charger with PowerIQ Technology for iPhone 6s / 6 / 5s, iPad, Samsung Galaxy S6 / S6 Edge / Edge+, Note 5, Nexus, HTC M9, Motorola, LG and More 3-in-1 functions3 in 1 Soil Moisture Meter, PH acidity measurement and light sensor together, provides you a comprehensive idea about the soil condition of your garden and lawn. No battery neededNo batteries or electricity needed, just plug the soil pH meter in the soil and instantly get an accurate and precise reading which helps your plants keep in a good condition. Easy to use:Three calibration tables on this multifunctional meter tool, from red, green to blue, easy to see and read. Great for taking good care of your plants. -Compact and portable design, convenient for indoor or outdoor use. Indoor or outdoor useIdeal and necessary soil care tool for gardeners, outdoor & indoor plants, gardens & grass lawn, fruits, flowers, vegetables, shrubs, etc. Important tips 1, Do not touch the stone or hard rock soil, if the soil is too hard and dry, easy to damage the probes; 2. Design for testing soil ONLY not for Water PH test; 3, After using, need to clean and wipe the probes.