The Astrea are stylish lace panties that also serves the purpose of letting your partner vibrate you from up to 12ft away. Inside of the panties you place a small vibrator (in a discreet pocket). From there your partner (or yourself) takes the remote and sends over a vibrating sensation. You can wear these panties easily under clothing or even use it as simply a pair of panties. The panties are a stretch-to-fit product. 2 AAA and 1 12v battery are included for immediate use.