Ohm Electric Sensor Chime & Alarm｜OCH-SA01 09-2000 From the manufacturer's website: ● Detects human movement and notifies you with two types of sounds (chime/security alarm) ● Alerts with a chime, deters intruders with a security alarm ・ Security alarm: Emits a loud 70dB alarm (approximately 1m away) ・ Chime: Plays a loud 70dB chime sound (approximately 1m away) ● One-touch mode switching between alarm/off/chime ● Can be installed in three ways: standing, laying down, or wall-mounted ● The sensor part can be adjusted 360 degrees ● Battery-powered, no wiring required, ready to use immediately after installation ● Uses 1 x 9V battery (sold separately) ● Can be used in various applications in stores and homes. Batteries are not included. No box. No instruction manual (refer to the manufacturer's website). Thank you for viewing.