There is NOT the battery in this remote .You need to buy it by yourself. The type of the battery is like most of TV remote.
The kit is consisted of transmitter and receiver, popular used for remote control. TX Technical Specifications: a. Working voltage: 3V~12Vb. Working current: max95mA (12V), min2mA(3V)c. Resonance mode: sound wave resonance (SAW)d. Modulation mode: OOK/ASKe. Working frequency: 433.92MHz, customized frequency is available.f. Transmission power: 50mW g. Frequency error: +150kHz (max)h. Velocity: 10Kbpsi. Self-owned codes: negative RX Technical Specifications: a. Working voltage: 5.0VDC +0.5Vb. Working current:2.5mA (5.0VDC)c. Working principle: superheterodyned. Working method: OOK/ASKe. Operating frequency: 433.92MHz, customized frequency is available;f. Bandwidth: 2MHz (having result from testing at lowing the sensitivity 3dBm)g. Sensitivity: excel -105dBm (50)h. Velocity:i. Output signal: TTL electric level signal entire transmit Package list? 1 x transmitter module 1 x receiver module Document:
Superheterodyne 3400 RF Link kits - X5guP2La