1) Battery life: Up to 1 year (based on 10 uses per day). 2) Long-range operation: 300m/984ft open range with strong signal penetration; indoor range approximately 20-60m. 3) Features: 60 music options, 5 volume levels, and receiver with track selection buttons for easy control. 4) High-quality sound: Built-in metal speaker with clear audio (85-97dB). 5) Ideal for homes, offices, schools, and hospitals as a wireless doorbell or alert system. - Supports multiple doorbells; each button can be assigned a unique ringtone. - Color: White - Material: ABS + Electronic components - Power: 3 x AAA batteries (not included). Package includes: 1 receiver, 2 transmitters. Note: Slight color variations may occur due to lighting or screen settings. Size tolerance: +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store