INNLIFE WIRELESS DOORBELL kit, the easiest and most favourable choice for homes, office buildings, hotels and more. longish Operating Range up to 1000ft The broadcasting doorbell supports an operating far-reaching 1000 feet working range, you 'll never miss any consequential guests or pressing deliveries with the help of the doorbell. Wide Application - all kinds of home furnishing, office buildings, hotels, factories - Emergency contact for the aged, expectant women, patient etc.. Easy Installation Just doorbell receivers in, put battery in transmitter, stick transmitter button external by door, and done ! . : Wireless Range : 1000 ft / 280 m in the OPEN AIR Tunes : 36 selectable options Volume : 4 level adaptable levels -LRB- 25dB to 85 dB -RRB- Receiver Power : AC 110-240V 50/60Hz Transmitter POWER : 12V -LRB- 1X23A Battery, included -RRB- Transmitter Power Consumption : tight -LRB- Transmitter -RRB- : IP44 Box Contents : 1 x Push Button -LRB- Transmitter -RRB- 2 x Plugin Chime -LRB- Receiver -RRB- 2 x Screws 1 x Double-Sided Adhesive Tape 1 x 12V A23 Alkaline battery for transmitter 1 x Flat-head screwdriver 1 x User non-automatic Here at INNLIFE, we stand by our products 100 % with a 12-month warranty. A paradisal purchasing experience is our # 1 and we will happily send a product replacement if any issues arise.