the product name is Whisper Audioguide

Product Detail Product Description 2.4G is a very compact system for simultaneous interpretation or daily tour guiding. The receiver has a size of Bluetooth earphone. It can be hanged on ear and is very convenient to use. There is no need to use a wired headphone. The receiver is powered by rechargeable Lithium battery. The battery can last12 hours per charge. The rubber of earphone and ear-hook are replaceable. The WAT07-EH system has the following features: Limitless amount of wireless receivers for each transmitter. Receiver can be hanged on ear. Battery can last 9 hours. Receiver can auto-scan and find a channel. High-Tech Rechargeable Lithium battery with large capacity. Very light weight. 2.4GHz international free frequency 83 independent channels to work at the same location Muti-unit charging case is available ParameterValue Wave band2400-2483MHz Frequency Response20-10 kHz Output Power18 dBm Sensitivity-110 dBm Distance120 meters Input3.5mm, microphone/audio Outputearphone Channels83 Power supply3.7 V Rechargeable Lithium battery, 10 hours battery life for receiver If you are looking for the whisper audioguide, Rich Technology must be your best choice. We're known as one of the leading China manufacturers and suppliers, offering you the customized service at low price. Welcome to buy or wholesale the quality guide system at a discount with our factory. url:http://www.richitek.com