Security alarm with automatic visitor notification function, providing peace of mind with a 90dB sound pressure level. When a door (sliding door) opens, a bird chirps "piyo piyo" as a greeting. - Brand: DELATEC - Model: SA-50 - Function: Automatic visitor notification - Volume: 90dB/10cm sound pressure level - Power: 2 AAA batteries (sold separately) - Features: FULL AUTO STOP I purchased this for security purposes, but I never used it and have kept it in storage. Thank you for looking. Please understand that this item is sold as-is (no returns, no refunds, no exchanges).