Caline Scuru S4 Guitar Mini Amp 10W Rechargeable Bluetooth Guitar Amplifer Combo for Desktop Practice S4 Scuru 10w Mini Guitar Amp with bluetooth, The S4 can play for up to four hours at a peak output of 10 watts. Even so, its tiny design makes it easy to handle with one hand.You can go everywhere with this mini amplififier, just plug and play. Built-in battery: Fully rechargeable Product name: S4 guitar mini amp Charge method: type-c (5v in) compatible mobile phone charger Speaker power: 5 watts x 2 speakers Power source: battery powered Compatible devices: eletrict guitar Guitar input: 1/4 inch plug jack 6.35mm Headphone output: 1/8 inch plug jack 3.5mm Switch: clean/DIST.,power on/off (bluetooth on/off) Knobs: Master vol.: control the master volume Gain vol.: control the amount of gain Tone: control the tone Level: Controls the overall signal volume Item size: 145 x 95.5 x 102.5mm Item weight: 0.68kg Color: As Shown Material: ABS+Metal Package Contents: 1 * Guitar Amp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.