The Micro Wanachi keychain is the world's smallest massager that’s BIG on thrills! At just 2.5” (6.3 cm) tall, this tiny tickler is perfect for on-the-go fun, anywhere and any time! Just flip the ON/OFF switch and you’re ready for a good buzz. Keep it on your keys and you’ll aways be ready for action! <br><br> Requires LR44 / AG13 (1.5V) Batteries (Included) <br><br> CAUTION: This vibrator is not intended for therapeutic purposes and is advised or recommended as these items are sold for novelty purposes only. This vibrator should be used with discretion.