[Eco-Friendly Material] The keys are made of ABS plastic, which are natural and environmentally friendly. It is powered by 2 AAA batteries (not included in the package) and has low power consumption for long-term use. [Pet Training Buzzer] You can record commands such as "food", "drink", "outside", "yes" and "no" to let your pet communicate with you. Just a little patience can make you understand pet mind. It is good for training cats, dogs and other pets. Different colored buttons can be used as options for different training. [Clear Recording] The recording button can record for up to 20 seconds, and the sound is clear. You can repeat the recorded sound, or re-record it. It has small size, easy to carry and very practical and interesting. [Easy to Use] First, click the REC button, and start recording after hearing a "beep". Second, release the REC button after the recording is completed, also you can hear the "beep" sound. Third, click the button, you will hear the sound of "beep" to your recording sound. Batteries can be installed and removed without tools. [Funny Gift] The pet button is good for entertaining interactions, pranks, desktop gadgets, messages, sending to distant friends, etc. It is the most creative birthday, holiday gifts for your unforgettable memories.