Bluetooth Stero Headset with TF / Micro SD Slot, FM Radio Function, Built-in Recording and MP3. Model K800 Color Black Type Hands-free Bluetooth headset SD Card Slot: YES Sound Stereo Bluetooth Version V2.1 EDR Bluetooth Chip CSR Wireless Frequency 2.4-2.48 GHZ Transmission Power Class

Bluetooth Stero Headset with TF / Micro SD Slot, FM Radio Function, Built-in Recording and MP3. Model K800 Color Black Type Hands-free Bluetooth headset SD Card Slot: YES Sound Stereo Bluetooth Version V2.1 EDR Bluetooth Chip CSR Wireless Frequency 2.4-2.48 GHZ Transmission Power Class 2 Transmission Range About 10 m Charger AC input 110-240 V, DC output 5 V Music Play Time About 8 hours Conversation Time About 10 hours Standby Time About 150 hours