2014 NEW Design 2.4G Digital Wireless Tour Guide Receiver Tour Guide System Wireless Audio Receiver Bluetooth Earphone Portable and rechargeable Black and White NO MOQ. Fast Delievery. Satisfactory gurantee for 24 months Specifications: 1.Small in size,flexible in design 2. 2.4G high frequency,it's legal and international free liense 3. Complete digital audio transmission technology,anti-interference 4. Transceiver scope: 70m 5.8-95 optional channels. for more tour groups use at same time and same occasion. 6.Simultaneous interpretation. 7. Easy to charge,the charge case for 28pcs receivers charging at a time.