Condition: 100% Brand New Item Type: Door Bell Material: ABS Classic Music: Single ''Alice'' Working Distance: Approx. 100m / 328.1ft (Outdoor) Infrared Sensing Distance: Approx. 3-7 meters / 9.8-23ft Battery: 9V Battery x 1, AA Battery x 2 (Not Included) Wireless detector Size: Approx. 8.9 x 6.2 x 4.8 cm / 3.5 x 2.4 x 1.9 in Receiver Size: Approx. 9.3 x 6.8 x 3.7 cm / 3.7 x 2.7 x 1.5 in Weight: Approx. 180g / 6.3oz Package List 1 x User Manual 1 x Sensor 1 x Receiver 1 x Bracket 1 The working range is up to 100 meters and the infrared sensing distance is 3-7 meters. 2 Made of high quality ABS material, eco-friendly, sturdy and durable in use. 3 Wireless installation, practical design and beautiful appearance, can be placed wherever you want. 4 The infrared sensor detects motion and sends a signal to the receiver, widely used in home, apartment, office, etc. 5 Electronic security to see remote detection system, wireless doorbell welcome alarm device.