1Fully fashionable shell, made of silicone, with IP3 dust-proof process, provides all-round protection, so no worry for outdoor sports. 2The music function and the telephone function are automatically converted. Built-in operation voice prompt function. 3Support for iOS (Apple) system speaker and electric quantity display. With external AUX audio playback function, compatible with mobile phones, Walkman, tablets, computers etc 4Built-in noise reduction HD microphone, one touch to answer, support hands-free calls 5Support self-timer function. Support simultaneously connecting two devices. Built-in TF slot, support maximum 32G TF card (NOT included). This Bluetooth speaker built-in noise reduction HD microphone features self-timer, hands-free, operation voice prompt function. You can experience high quality sound music with this speaker via Bluetooth connection or audio cable connection at home, small party, car, off hours in office, dorm room, outdoor etc. Features: 1. Fully fashionable shell, made of silicone, with IP3 dust-proof process, provides all-round protection, so no worry for outdoor sports. 2. The music function and the telephone function are automatically converted. 3. Built-in operation voice prompt function. 4. Support for iOS (for Apple) system speaker and electric quantity display. 5. With external AUX audio playback function, compatible with mobile phones, for Walkman, tablets, computers etc. 6. Built-in noise reduction HD microphone, one touch to answer, support hands-free calls 7. Support self-timer function. Support simultaneously connecting two devices. 8. Built-in TF slot, support maximum 32G TF card (NOT included). Specifications: Product Size: 159mm * 58mm / 6.26 * 2.28inch Product Color: Red, Black, Army green, Orange, Light green (Optional) Material: Silicone + PVC + Metal Package Weight: 415g Bluetooth Version: Bluetooth V4.1 + EDR Channel System / Program: two-channel stereo 2 * 3W / Jianrong Battery Capacity: Polymer Battery 3.7V, 1400mAh Charging Time: 4-5 hours Talk Time: > 10 hours (90% of volume) Music Time: 5 hours (60% of volume) Support Protocol: A2DP, AVRCP, HSP, HFP Charging Standard: Micro USB, DC5V, 500mA-1000mA Bluetooth Operating frequency: 2.402GHz-2.480GHz Best Call Distance: