Main Functions : 1. 8-way 1500m conference talkback 2. Multiple device connected simultaneously 3. Can be used with FreedConn handle remote control L3 4. Wired/wireless connection with handheld interphone 5. Built-in radio 6. 3.5mm headphone jack 7. 2.5 converted to 3.5mm AUX audio line 8. Voice Prompt 9. Music sharing 10. Usable during recharging Technical Parameters of Product Frequency : 2.4GHz Weight : 110.2grams Size: 100.8*77.2*42.7mm Battery Type : 470mAh Stand by : Up to 300hrs Talking Time : - Phone : up to 7 hours - Intercom : up to 6 hours Charging Time : Above 3 hours Tavel Adaptor : DC 5V 500mA In Stock Please PM. Thanks !