Rockville RPB2-RED Handheld Portable Bluetooth Speaker Mini Speaker with great frequency range and balanced sound TWS - True wireless stereo to link 2 speakers wirelessly Built out of high quality aluminum Bluetooth version 5.0 Hands Free phone calls using the built in microphone Built-in SD Card Slot On android phones, you can use the speaker as a selfie remote Input Voltage : DC 5V 1A Li-Polymer battery: 300mAh Driver : 40mm, 4Ω 3W Net Weight: 95g Sound output: 5W Bluetooth range: 25 Feet Frequency response: 120HZ-20KHZ Charging Time: 30 - 40 minutes 25% volume battery life: 5 hours 50% Volume battery life: 3.5 hours Max volume battery life: 2 hours Color: Red