Item NO. AD-539 Bluetooth Sunvisor Series Product Features 1. Easy to install - mount over the sun visor. 2. Speak caller name or caller number( support multiple languages selection, including English, French, German, Italian, Spanish) --TTS 3. Answer/ end/ reject a call, call waiting. 4. Voice dialing , last call redialing and call switching function. 5. Volume control. 6. Phone book synchronization function--OPP 7. Built-in high intelligent microphone and powerful speaker. 8. Support Multiple paired, and support two link. 9. With rechargeable Lithium DC 3.7V, 650mhA , standby time about 40 days. Technical support 1. Compatible Bluetooth Specification V2.1+ EDR, Rang 0-10 meters 2. Support Headset and HandsFree profiles 3. Support OPP TTS function 3. Complete bluetooth wireless installation. 4. Operating Frequency Band: 2.4GHz ~ 2.48GHz 5. Integrated with echo cancellation and Noise suppressor Packing Details Porduct size: 11.8* 4.6* 1.6 cm Carton size: 45.0* 27.0c* 32.0 cm Pcs per Ctn: 40 pcs N.W.: 8.1KG G.W.: 8.6KG