When you press the button, it will flash a bright light and sound to notify you. Power supply: Transmitter: 2 CR2032 coin type lithium batteries, Receiver: 3 AA alkaline batteries, or AC adapter (7-1751-15) sold separately
Wireless range: Approx. 50m (indoor line of sight)
Material: ABS resin
Weight: Transmitter/38g (excluding batteries), Receiver/215g (excluding batteries)
Melody sound types: 16 types (chimes, melody sounds, sirens, etc.)
Volume: Maximum 110dB/m (volume adjustable)
Set contents: 1 transmitter, 1 receiver (XP4000), test batteries
