<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><span style="font-size:18px">1. The transmitter is powered battery and has a battery life of over 6 months<br/>2.85 decibels high volume, four level volume adjustment<br/>3. Oval design, lightweight and ultra-thin,simple and beautiful<br/>4. The transmitter is not afraid of splashing water and can be installed outdoors or in a washing room<br/>5.38 ringtones to choose from, pleasant and melodious, with high notes not broken<br/>6. Long distance signal transmission can pass through walls (approximately 30 meters indoors and 200 meters in open spaces)<br/>7.Widely applicable, it can be used in homes, villas, and offices, avoiding the noise caused by knocking on doors when guests visit, and also appearing more polite. It can also be used as a care bell for the elderly or children, and when assistance is needed, simply press the transmitter.<br/><br/>Technical parameters<br/>1.Wireless frequency: 433 MHz<br/>2.Ringtone volume:&gt;50dB/1m <br/>3. Wireless distance: 200 meters (open space) <br/>4.Receiver size:60x20x60mm <br/>5.Transmitter size:40x12x70mm<br/>6.38 ringtones to choose from<br/><br/>Note:<br/>1. Our product needs to be used with a receiver, unless you have previously purchased our product and need to purchase additional accessories, otherwise purchasing a transmitter or receiver separately will not work.<br/>2. Due to the significant shielding effect of metal on wireless signals, please do not attach the transmitter to metal doors such as iron doors, anti-theft doors, fire doors, etc. In addition, the receiver should not be obstructed by metal plates.<br/> If you find that the response distance is too close, please be sure to check if there is any metal affecting the signal transmission and reception of the product.</span><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/></div></div><br/>