Product overview and key benefits Reliable detection and low false alarms thanks to a chip that ensures stable operation. Wide sensing range to cover entrances and rooms: sensor can detect motion from 0 to 8 meters, with typical transmitter sensing distance 3 to 7 meters. Clear audio alerts with fidelity speakers and 38 builtin melodies to choose from. Flexible wireless placement and low power consumption for long service life: wireless reception up to 150 meters in ideal conditions and practical working distance up to 70 meters. Simple installation and removable mounting bracket for easy positioning on walls or other surfaces. Main features Detection: 0 to 8 meters detection range; transmitter sensing distance listed as 3 to 7 meters. Wireless reception and range: maximum reception up to 150 meters in open conditions; typical working distance up to 70 meters. Audio: fidelity speaker with 38 selectable music tones; side music buttons for selecting melodies. Volume control: threespeed volume adjustment , medium, low using the side volume indicator button. Silent mode: can be set to with sound or silent. With sound mode plays melody and shows indicator light; silent mode disables sound while leaving indicator active. Power: receiver operating voltage 110240V. Transmitter operating voltage 4.5V (3 batteries, 7 batteries). Low consumption design for extended battery life in the transmitter. Physical dimensions: receiver 76 x 80 x 33 mm; transmitter 80 x 59 x 45 mm. Mounting: rotating bracket included for rear attachment; host position removable for flexible installation. Operation instructions 1. Plug the receiver into a socket. 2. Open the transmitter battery cover and install batteries. 3. Fit the rotating bracket into the slot on the back of the transmitter for wall mounting if desired. 4. Push the detector switch to the ON position. Wait about 10 seconds for selftest, then the system enters normal working state. Package contents 1 receiver 1 transmitter 1 instruction manual Practical use scenarios Hotel or guest room: mount the transmitter near the door to alert staff or guests when someone enters, with adjustable volume to suit the environment. Retail or office: use as an entry chime to notify staff of customer arrival while keeping noise levels controlled with three volume settings and silent indicator option. Home: place the transmitter at a back door, garage entry, or hallway to receive a clear audible or visual alert when motion is detected, with flexible placement enabled by the removable bracket and wireless reception. Compatibility and installation notes Receiver works with standard AC power outlets in the 110240V range. Transmitter uses 4.5V supply as specified; follow battery type recommendations in the manual. Allow 1 to 3 cm tolerance in physical measurements due to manual measurement. Color may vary slightly from photos depending on display settings. This product provides reliable motion detection, configurable audio alerts, and flexible installation for hotels, shops, offices, and homes.