Specification:

Maximum 1000ft operating range in open area
38 unique ringtones
3 volume levels
LED indicators
Volume range: 25 to 80dB
Dimension:
Receiver: 2.56 x 3.74 x 0.94 inch;
Transmitter: 2.01 x 2.95 x 0.79 inch;
Package Includes:

2x Receivers
1x Transmitter
Tapes / Screws / Stickers