Features:
– Supports up to 20 buttons and 100 receivers
– Customisable ringtones for each button
– Power-off memory function
– Waterproof and dustproof design
– Uses 23A12V alkaline battery (not included)
– Receiver voltage: 110-220-240V
– Available in US/EU/UK Plug and AU adapters
– 300 meters receiving distance
– 5 levels of volume (0-110db) with 60 music options
– Compact sizes: Transmitter 75x51x20mm, Receiver 95x65x24mm

Specifications:
– Brand: Not specified
– Origin: Mainland China
– Certification: CE
– Doorbell Type: Wireless
– Model Number: A10
– Type: Doorbells
– Power Source: Battery, AC
– Receiver plugs: US/EU/UK Plug and AU adapters
– Receiving distance: 300 meters
– Button cannot be placed on an iron door
– Receiver has power-off memory function

Package includes:
– 1 Button or 1 Receiver (choose accordingly)
– Instruction manual for pairing signals