doorbells can be used in homes, villas, office buildings, hotels, buildings, dormitories, factories, etc. The doorbell is installed at the door of the home, and the signal from the doorbell can be received in the home, and the bell will be sent to remind someone to visit.

Features:
1. Long-distance reception: The doorbell receiver can be directly plugged into the , and the reception is accessible within a of 150M, and the transmission signal is stable, which can meet the daily use of the home doorbell.
2. Press to generate electricity: The doorbell supports press to generate electricity, no is required, and the service is long. ( Press the doorbell , the pressing is than the traditional doorbell, to ensure the . )
3. Custom ringtone: There are three levels of ringtone , and you can adjust the at will by pressing your finger. There are 36 kinds of to choose from as ringtones.
4. Waterproof and material: The doorbell is made of ABS fireproof material, IPX4 grade,  dustproof and waterproof, , -oxidation, can be used indoors and outdoors.
5. Hole-: The doorbell is equipped with self-adhesive stickers, which can be installed without holes, and can be pasted on , tile walls, smooth and flat wooden boards, etc.
6. indicator: The indicator is soft and not dazzling. In silent mode, only the flashes without ringing, so as to waking family members.

Note:
1. Due to manual measurement, there will be a 1-2 mm error in the size.
2. Due to different conditions and different monitors, the color of the product is slightly different, thank you for your understanding.


Specifications:
Color: Black / White (Optional)
Material: ABS + Acrylic
Type:
Working Voltage: AC
Working Current: < 100MA
Working Frequency: 50/60Hz
Operating : 0°C ~ 60°C
conservation Class: IPX4
Receiving Distance: 150M
Item Size (L*W*H): 10*6*2.7cm / 3.94*2.36*1.06in (Receiver), 6.8*4*2cm / 2.68*1.57*0.79in ()
Packing Size (L*W*H): 13*9*7cm / 5.12*3.54*2.76in 
Net Weight: 115g / 4.06oz
Gross Weight: 145g / 5.11oz

Package List: E21751B-
1 * (With Self-adhesive Sticker)
1 * Receiver
2 * Screws
1 * Warning Sticker