• Power/Technology: Rechargeable Lithium-Ion battery: 400 mAh/3.7V; Input: DC 5V; Output: 3W; Wireless 2.1; Frequency 100hz – 20khz; SNR: 80dB; Transmission range: up to 10m (30 ft); Water-resistant to IPX5 standard* (splashes of water only, DO NOT SUBMERGE) • Functions include: speaker, FM radio • Made of ABS Plastic, with Aluminum carabiner attached • Connects to your mobile device using wireless technology, can also connect through 3.5mm audio cable (included) • Approx. playback time: up to 2-4 hours • Device lights up red while charging battery. Light turns off once charge is complete. • Includes USB to Micro USB charging cable and 3.5mm audio cable. • Must charge prior to first use. Charge time varies by device. • Instructions included • FCC Approved