Material: Plastic - Brand: N/A - Model: ML-9510FD3 - Color: White + Red + Blue - Quantity: 1 - Power supply: Receiver: 2 x AA batteries (not included); Transmitter: 1 x 12V battery (included) - Remote controlled distance: 100~150m - Voice decibels: 60~70dB - Wireless easy to install - Digital quartz crystal section repetition rate 1/10000 - Less power consumption - When the music sounds 3 kinds of colors of the lights are dancing - Great for hearing disabled people and old men to know the doorbell is ringing - Packing list: - 1 x Transmitter - 2 x Receivers - 1 x Battery