【Max 40Hours &Portable Power Bank】Table fan Power supplied by 4400mah(2*18650 ) rechargeable batteries max working time 40 hours .Its portable power bank to power mobile phones,Exclusive IC that charges the mobile power and operation of the fan togher. Pefect for stroller , camping out, picnicking sporst acitives . 【360 Degree Rotation& Stepless Speed】 This rechargeable desk fan supports 360° manual vertical flip to keep you enjoy the cool wind at every angle.High speed and lower noise (≤40dB), the speed can be stepless regulated even